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TAR<br />

Terrestrial Arthropod Reviews 4 (2011) 17–39 brill.nl/tar<br />

<strong>Geophilomorph</strong> <strong>centipedes</strong> <strong>and</strong> <strong>the</strong> <strong>littoral</strong> <strong>habitat</strong><br />

Anthony D. Barber<br />

Rathgar, Exeter Road, Ivybridge, Devon, PL21 0BD, Engl<strong>and</strong><br />

e-mail: abarber159@btinternet.com<br />

Received: 1 October 2010; accepted: 27 October 2010<br />

Summary<br />

More than 40 species from at least 20 genera in 6 or more families of <strong>the</strong> <strong>Geophilomorph</strong>a (Chilopoda)<br />

are recorded from marine <strong>littoral</strong> <strong>habitat</strong>s in various parts of <strong>the</strong> world. Although <strong>the</strong>re is little recent work<br />

on <strong>the</strong>ir physiology it seems that <strong>the</strong>y have <strong>the</strong> capacity to tolerate <strong>the</strong> osmotic <strong>and</strong> respiratory regime<br />

that is involved <strong>and</strong> <strong>the</strong>ir anatomical adaptations to a burrowing habit <strong>and</strong>, at least in some cases, <strong>the</strong>ir<br />

behaviour makes <strong>the</strong>m a fairly constant component of sea-shore ecosystems where <strong>the</strong>y sometimes occur<br />

in surprisingly large numbers. It is suggested that <strong>the</strong> richness of <strong>the</strong> food source in <strong>the</strong>se <strong>habitat</strong>s, along<br />

with o<strong>the</strong>r factors such as shelter, microclimate <strong>and</strong> possibly absence of parasites <strong>and</strong>/or predators would<br />

be <strong>the</strong> main reason why <strong>the</strong>se now terrestrial animals have re-invaded <strong>the</strong> seashore so many times since<br />

<strong>the</strong>ir fi rst appearance in <strong>the</strong> Palaeozoic. Th eir tolerance of seawater <strong>and</strong> occurrence on coasts could lead<br />

to passive distribution by rafting <strong>and</strong> <strong>the</strong> occurrence of isolated populations could result in genetic<br />

diff erences.<br />

© Koninklijke Brill NV, Leiden, 2011.<br />

Keywords<br />

<strong>Geophilomorph</strong>a ; Chilopoda ; <strong>littoral</strong> <strong>habitat</strong>s.<br />

Introduction<br />

Arguing from body fl uid data, Little ( 1990 ) considered myriapods <strong>and</strong> insects to be of<br />

marine origin; many legged arthropods would seem to have been some of <strong>the</strong> earliest<br />

l<strong>and</strong> arthropods with, so has been suggested, a previous long aquatic history (Selden<br />

<strong>and</strong> Edwards, 1989 ). Divergence of <strong>centipedes</strong> <strong>and</strong> millipedes has been estimated at<br />

442 ± 50 Ma (Pisani et al, 2004 ). Terrestrial millipede fossils date back to <strong>the</strong> Devonian<br />

(Shear <strong>and</strong> Selden, 2001 ) whilst evidence for tracheal systems in arthropods comes<br />

from <strong>the</strong> Mid Silurian (Wilson <strong>and</strong> Anderson, 2004 ). Th e earliest centipede remains,<br />

leg segments of Scutigeromorpha, date from <strong>the</strong> Upper Silurian (Shear <strong>and</strong> Selden,<br />

2001 ). Th ese long-legged animals would have probably have been surface running<br />

ra<strong>the</strong>r than litter inhabiting. It is not until <strong>the</strong> Late Carboniferous that a possible<br />

© Koninklijke Brill NV, Leiden, 2011 DOI 10.1163/187498311X546986


18 A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39<br />

geophilomorph is recognised in <strong>the</strong> fossil record (Mundel, 1979 ). Th e divergence<br />

of <strong>the</strong> <strong>Geophilomorph</strong>a is minimally dated by a form from <strong>the</strong> Upper Jurassic,<br />

Eogeophilus jurassicus (Shear <strong>and</strong> Edgecombe, 2010 ). Present day geophilomorphs<br />

comprise about 1,300 valid taxa, grouped into 14 families representing approxima -<br />

tely 40% of known centipede species (Rosenberg, 2009 ) <strong>and</strong> are elongate, worm<br />

like animals characterised by homonomous segmentation with 27 -191 leg-bearing<br />

segments.<br />

Th e earliest report of a halophilic centipede is Leach’s description of <strong>the</strong> geophilomorph<br />

now known as Strigamia maritima (Leach, 1817 ). Since its recognition<br />

fur<strong>the</strong>r <strong>littoral</strong> species have been reported; Lewis ( 1981 ) listed 13 <strong>and</strong> we now know<br />

of more than 40 taxa from all continents except Antarctica <strong>and</strong>, of <strong>the</strong>se, all but<br />

two are geophilomorphs (Barber, 2009a ). Corresponding numbers for <strong>the</strong> o<strong>the</strong>r<br />

myriapod groups are signifi cantly smaller with only about four to six defi nitely halophilic<br />

millipedes known (out of a total of about 10,000 species described). O<strong>the</strong>r<br />

terrestrial arthropod groups also have shore dwelling species but (with <strong>the</strong> exception<br />

of Acari) <strong>the</strong>y represent but a small proportion of <strong>the</strong> known types. According to<br />

Cheng ( 1976 ), of <strong>the</strong> species of insects known about 3% are aquatic or have aquatic<br />

larval stages but of <strong>the</strong>se, only a fraction, “perhaps several hundred species” are marine<br />

or intertidal.<br />

At present <strong>the</strong>re are no known species of freshwater <strong>centipedes</strong> although Strigamia<br />

maritima has been found in a more or less completely fresh water site (Armitage,<br />

1982 ); <strong>the</strong>re are two or three millipedes with adaptations for fresh water (Golovatch<br />

<strong>and</strong> Kime, 2009 ). Hence <strong>the</strong> interesting question as to why <strong>the</strong>re are relatively<br />

so many halophilic geophilomorphs (at least 20 genera in six or more diff erent families;<br />

Table 1 )?<br />

Table 1. <strong>Geophilomorph</strong> families <strong>and</strong> genera containing known or possible <strong>littoral</strong> species. (Based on<br />

Barber, 2009a )<br />

Family Genera with <strong>littoral</strong> species Genera with possible <strong>littoral</strong><br />

species<br />

Mecistocephalidae Mecistocephalus<br />

Oryidae Orphnaeus<br />

Himantariidae Gosothrix, Stigmatogaster<br />

Schendylidae Hydroschendyla, Nyctunguis,<br />

Pectiniunguis, Schendyla, Schendylops, Bimindyla, Nesonyx,<br />

Th indyla<br />

Ballophilidae Ballophilus, Caritohallex Ityphilus<br />

Lintotaeniidae Strigamia<br />

Dignathodontidae Henia<br />

Geophilidae Erithophilus, Geophilus, Lionyx,<br />

Maoriella, Mixophilus, Pachymerium,<br />

Polycricus, Tuoba, Tretecthus<br />

Diphonyx<br />

Aphilodontidae Aphilodon


A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39 19<br />

Why do terrestrial animals invade <strong>the</strong> <strong>littoral</strong> <strong>habitat</strong>?<br />

Little ( 1990 ) has a telling diagram (Fig.7.3) of <strong>the</strong> food web of <strong>the</strong> thysanuran Petrobius<br />

brevistylis. Although Petrobius is almost confi ned to <strong>the</strong> maritime zone <strong>and</strong> feeds on<br />

maritime plants its main predators are of terrestrial origin, Lithobius sp. (centipede)<br />

<strong>and</strong> Zygiella sp. (spider).<br />

Here we may have a clue as to why so many diff erent groups of terrestrial animals<br />

might have invaded <strong>the</strong> <strong>littoral</strong> zone. Intertidal areas are often highly productive. Larger<br />

algae <strong>and</strong> microscopic forms colonise many seashores <strong>and</strong> estuarine sites are rich in<br />

nutrients brought down by rivers. Seashores also receive quantities of (mostly) plant<br />

material (algae, seagrass, etc.), often in large amounts, brought in by <strong>the</strong> tides <strong>and</strong> <strong>the</strong>re<br />

may be a signifi cant input of guano from seabirds in some locations. In various stages<br />

of decomposition all this material can provide nutrition for a range of herbivores <strong>and</strong><br />

detritivores which in turn are available to carnivores including <strong>centipedes</strong>. Th ere are<br />

various examples in <strong>the</strong> literature of what appear to be energy fl ow from <strong>littoral</strong> to<br />

terrestrial <strong>habitat</strong>s in this way. For instance, Polis <strong>and</strong> Hurd ( 1995 ) report on extraordinarily<br />

high densities of spiders on small isl<strong>and</strong>s in <strong>the</strong> Gulf of California which<br />

<strong>the</strong>y attribute to a combination of energy fl ow from marine to terrestrial food webs<br />

<strong>and</strong> <strong>the</strong> absence of larger predators. Polis et al ( 2004 ) discussed <strong>the</strong> whole issue of<br />

trans-boundary transfer between <strong>habitat</strong>s, including that of sea to l<strong>and</strong>. In an extreme<br />

case of this, Catenazzi <strong>and</strong> Donnelly ( 2007 ) report on <strong>the</strong> relationship between <strong>the</strong><br />

terrestrial desert <strong>and</strong> <strong>the</strong> highly productive marine environment at Paracas Bay,<br />

Peru. Consumers in this nocturnal intertidal food web included Collembola,<br />

Th ysanura, Diptera, Coleoptera, Talitridae, geophilomorph Chilopoda ( Th indyla <strong>littoral</strong>is<br />

), Solifugi, Araneae, Scorpionidae <strong>and</strong> Reptilia. Th e <strong>centipedes</strong> were recorded at<br />

an average density of 4.26±0.96 m -1 with a maximum of 49 m -1 . Th e extremely high<br />

densities of Strigamia maritima sometimes seen on North European shores are very<br />

striking ( Figure 1 ).<br />

Even if, perhaps, in o<strong>the</strong>r locations, <strong>the</strong>re is actually no net energy transfer between<br />

marine-<strong>littoral</strong> <strong>and</strong> terrestrial food webs at <strong>the</strong> interface, shoreline production <strong>and</strong><br />

washed up material would broaden <strong>the</strong> resource base <strong>and</strong> could entice terrestrial animals<br />

into <strong>the</strong> <strong>littoral</strong> zone.<br />

In addition to food resources, rocky shores provide crevices which provide shelter<br />

<strong>and</strong> could trap air as could burrows in mud <strong>and</strong> s<strong>and</strong>. Shingle provides sheltered interstices<br />

<strong>and</strong> <strong>the</strong> drift line a possible rich, if more temporary, shelter <strong>and</strong> food resource.<br />

Such environments can provide a degree of protection against wea<strong>the</strong>r <strong>and</strong> predators as<br />

well as a relatively humid environment <strong>and</strong> <strong>the</strong> sea itself will provide an ameliorating<br />

eff ect on climate in <strong>the</strong> <strong>littoral</strong> zone. Th e possible absence of parasites due to unfavourable<br />

conditions for <strong>the</strong>ir alternate hosts might also be a factor in favour of entry of<br />

species into this <strong>habitat</strong> (Lewis, 1981 ).<br />

<strong>Geophilomorph</strong>s have been observed to feed on a variety of annelids <strong>and</strong> molluscs<br />

according to Lewis ( 1981 ). He describes recorded food which including leodocid<br />

worms (fed on by Hydroschendyla maritima (Grube, 1872)) <strong>and</strong> unspecifi ed crustaceans.<br />

Barnacles ( Balanus balanoides ), Orchestia gamarella , Sphaeroma sp. top shells <strong>and</strong>


20 A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39<br />

Figure 1. Strigamia maritima (Leach, 1817 ) male in shingle Seil Isl<strong>and</strong>, Scotl<strong>and</strong>.<br />

o<strong>the</strong>r gastropods ( Littorina saxatalis ) <strong>and</strong> lumbricid worms were all observed at various<br />

times to be fed on by Strigamia maritima . Th e same author also described how Strigamia<br />

maritima attacked small Orchestia (or Drosophila if off ered) by tearing <strong>the</strong> prey to<br />

pieces. When attacking larger Orchestia , 1cm or more in length (which it only did if<br />

<strong>the</strong>y were damaged or dying) it made a transverse slit <strong>and</strong> pushed its head <strong>and</strong> anterior<br />

segments inside <strong>and</strong> <strong>the</strong> poison claws were seen to be constantly in motion macerating<br />

tissue whilst <strong>the</strong> centipede was involved in what seemed to be external digestion <strong>and</strong><br />

suctorial feeding. Group feeding, as observed in this species could be advantageous in<br />

dealing with prey that would o<strong>the</strong>rwise be invulnerable to <strong>the</strong>m. Alternatively, small<br />

specimens could enter barnacles o<strong>the</strong>rwise inaccessible to larger animals <strong>and</strong> bring<br />

about <strong>the</strong>ir opening. Lewis suggests that it is possible that pheromones might be<br />

involved in this group behaviour.<br />

Members of o<strong>the</strong>r orders of <strong>centipedes</strong> such as <strong>the</strong> scutigeromorphs <strong>and</strong> lithobiomorphs<br />

with <strong>the</strong>ir relatively long legs <strong>and</strong> rapid movement would be able to move<br />

from <strong>the</strong> supra<strong>littoral</strong> zone into <strong>the</strong> upper intertidal area at low tide <strong>and</strong> back again<br />

before <strong>the</strong> tide came in <strong>and</strong> submerged <strong>the</strong>m or shelter, if necessary, in air fi lled crevices<br />

as <strong>the</strong> scorpion Serradigitus <strong>littoral</strong>is (Williams, 1980) of Baja California is thought to<br />

do (Due <strong>and</strong> Polis, 1985 ). Maybe some could even adopt a lifestyle similar to that<br />

described in <strong>the</strong> wolf spider Pardosa lapidicina Emerson, 1885 which moves back <strong>and</strong><br />

forth with <strong>the</strong> tides (Morse, 1997 ). However, such an option would not be available<br />

to <strong>the</strong> relatively slow moving geophilomorphs which certainly could migrate up


A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39 21<br />

<strong>and</strong> down <strong>the</strong> beach on a seasonal basis as described for Strigamia maritima (Lewis,<br />

1961a) but would not be able to do this twice a day as required by following <strong>the</strong> tidal<br />

cycle; in any case, this would be unlikely to be energy effi cient. If <strong>the</strong>refore, <strong>the</strong>y were<br />

able, because of <strong>the</strong>ir morphology <strong>and</strong> physiology, to take up more or less permanent<br />

residence in areas directly exposed to seawater <strong>the</strong>n this would be advantageous in<br />

exploiting <strong>the</strong> <strong>littoral</strong> resource.<br />

Adaptation of geophilomorphs to <strong>the</strong> <strong>littoral</strong> <strong>habitat</strong><br />

A survey of <strong>the</strong> locations from which seashore geophilomorphs have been recorded<br />

includes rock crevices, shingle, under rocks or stones on shingle, s<strong>and</strong> or mud, under<br />

stones etc. on salt marshes, under seaweed or o<strong>the</strong>r plant material (e.g Posidonia ,<br />

Zostera ) or o<strong>the</strong>r material <strong>and</strong> “str<strong>and</strong> line debris”. Str<strong>and</strong>ed material off ers a ra<strong>the</strong>r<br />

open <strong>habitat</strong> <strong>and</strong> so it is not surprising that it is colonised by a diversity of arthropods<br />

including <strong>centipedes</strong> whilst crevice dwelling off ers great opportunities for <strong>the</strong> more or<br />

less burrowing geophilomorphs with <strong>the</strong>ir worm-like bodies <strong>and</strong> <strong>the</strong>ir modes of<br />

locomotion.<br />

Animals living here need to be able to tolerate (or avoid by migration or survival in<br />

air spaces) <strong>the</strong> eff ect of inundation with its consequential respiratory <strong>and</strong> osmoregulatory<br />

implications. Animals will be immersed in seawater twice daily for a shorter or<br />

longer time depending on <strong>the</strong>ir location on <strong>the</strong> shore although not normally facing<br />

continuous 24 hour immersion. Th ey will also be in contact with saline substrates<br />

(algae, s<strong>and</strong>, stones, etc.) <strong>and</strong> will be taking in salt ions in <strong>the</strong>ir food. In estuarine<br />

conditions <strong>the</strong>re will also be an issue of varying salinity, generally below that of full<br />

sea-water.<br />

Unfortunately most of <strong>the</strong> work on <strong>the</strong> physiology <strong>and</strong> adaptations of <strong>littoral</strong><br />

geophilomorphs is ra<strong>the</strong>r old <strong>and</strong> fur<strong>the</strong>r studies are clearly desirable.<br />

Body design<br />

Manton ( 1965 ) identifi ed a range of features that adapted geophilomorphs to <strong>the</strong>ir<br />

burrowing <strong>and</strong> crevice dwelling life <strong>and</strong>, although she generalised from studies on a<br />

small number of species, her observations do seem to have some relevance. However, it<br />

must be borne in mind that <strong>the</strong>re is considerable variation as between diff erent species,<br />

genera <strong>and</strong> families. For instance, <strong>the</strong> head is more or less oblong ra<strong>the</strong>r than tapered<br />

in some species (e.g. some Geophilu s spp., Pachymerium ferrugineum ) nor do all show a<br />

clear ‘transition’ <strong>and</strong> members of <strong>the</strong> Mecistocephalidae are unlike o<strong>the</strong>r geophilomorphs<br />

in a number of ways.<br />

When walking, geophilomorphs proceed relatively slowly although with little lateral<br />

undulation, feeling <strong>the</strong>ir way forward with <strong>the</strong>ir antennae (all are eyeless) <strong>and</strong> with<br />

<strong>the</strong> capacity for backward movement if required. Th is allows <strong>the</strong>m to explore cre -<br />

vices in search of prey or shelter <strong>and</strong> to retract as necessary <strong>and</strong> when sheltering <strong>the</strong>ir<br />

fl exible multi-segmented bodies allow <strong>the</strong>m to coil up <strong>and</strong> occupy a limited volume<br />

( Figure 2 ).


22 A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39<br />

Figure 2. Hydroschendyla submarina (Grube, 1872) as found coiled up in a rock crevice at Wembury,<br />

Engl<strong>and</strong>.<br />

When burrowing in an earthworm-like manner, <strong>the</strong> large number of short segments<br />

each of which can shorten <strong>and</strong> thicken allows extension <strong>and</strong> contraction of trunk<br />

regions. In addition <strong>the</strong> head is relatively small <strong>and</strong> often tapered with mouthparts<br />

which sweep semi fl uid material from <strong>the</strong>ir partially externally digested prey into<br />

<strong>the</strong> digestive system. Th e anterior third of <strong>the</strong> trunk (in front of <strong>the</strong> so called “transition”,<br />

if present) may be very distinctively tapered <strong>and</strong> with <strong>the</strong> narrow oesophagus,<br />

heart <strong>and</strong> nerve cord having been described as centrally positioned to minimise deformation<br />

by changes in <strong>the</strong> dimensions of <strong>the</strong> segments. Manton describes <strong>the</strong> cuticle<br />

as being thicker in this anterior region <strong>and</strong> forming an armour of sclerites including<br />

intecalary tergites <strong>and</strong> sternites which allow for changes in shape whilst at <strong>the</strong> same<br />

time individual sclerites have fl exibility at <strong>the</strong> margins <strong>and</strong> stiff ness in <strong>the</strong> centre so<br />

that thrusts can be transmitted but <strong>the</strong> armour remains intact <strong>and</strong> <strong>the</strong> plates do not<br />

crack. In addition <strong>the</strong> longitudinal muscles are relatively large. An anterior region of<br />

<strong>the</strong> body of <strong>the</strong> head <strong>and</strong> anterior trunk with relatively stout legs, adapted for strong<br />

slow movements, allows extension <strong>and</strong> contraction of <strong>the</strong> front of <strong>the</strong> body with headon<br />

burrowing to make <strong>the</strong> burrow wide enough for <strong>the</strong> remainder of <strong>the</strong> body to<br />

follow. ( Figure 3 )


Body fl uid regulation<br />

A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39 23<br />

Figure 3. Stigmatogaster subterranea (Shaw, 1789) to show <strong>the</strong> body shape of a geophilomorph with a<br />

distinct transition. Although normally a terrestrial species, this specimen was actually found under a stone<br />

on estuarine mud, River Lynher, Cornwall, Engl<strong>and</strong>.<br />

As a legacy of <strong>the</strong>ir original marine origin myriapods have body fl uid concentrations<br />

comparable to that of crustaceans (Little, 1990 ). For <strong>the</strong> two marine species studied by<br />

Binyon <strong>and</strong> Lewis ( 1963 ), Strigamia maritima has a body fl uid OP of 462 mOsm.kg -<br />

<strong>and</strong> a Na + level 274 mM.l -1 <strong>and</strong> Hydroschendyla submarina 498 mOsm.kg - <strong>and</strong> 283<br />

mM.l -1 which are only slightly higher than <strong>the</strong> terrestrial Stigmatogaster subterranea<br />

(Shaw, 1789) with 438 mOsm.kg - <strong>and</strong> 205 mM.l -1 although higher than those of <strong>the</strong><br />

lithobiomorph Lithobius forfi catus at 370 mOsm.kg - <strong>and</strong> 190 mM.l -1 (Little, 1983 ).<br />

Th ese levels are about half or slightly less than that of full seawater so that such <strong>littoral</strong><br />

animals will still need to have mechanisms for regulating body fl uid volume e.g.<br />

removal of excess ions by some mechanism. Alternatively, <strong>the</strong>y will need be able to<br />

tolerate changes of body fl uid concentration.<br />

For terrestrial <strong>centipedes</strong> with <strong>the</strong>ir incomplete waterproofi ng / limited spiracular<br />

closing mechanisms, dry air poses a threat of desiccation (as would seawater). Damp<br />

environments which <strong>the</strong>y normally tend to inhabit will pose <strong>the</strong> opposite threat of<br />

osmotic water uptake which seems to be dealt with by removal of water in <strong>the</strong> gut <strong>and</strong><br />

retention of ions. It is possible that <strong>the</strong> coxal gl<strong>and</strong>s may, in some way be involved in<br />

transporting (Little, 1983 ); see also <strong>the</strong> review of <strong>the</strong>se in Rosenberg ( 2009 ).


24 A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39<br />

<strong>Geophilomorph</strong> <strong>centipedes</strong>, both terrestrial <strong>and</strong> <strong>littoral</strong> have been shown to be<br />

more tolerant of immersion than lithobiomorphs (Hennings, 1903 Plateau, 1890 ).<br />

Schubart ( 1929 ) found that submerged specimens of Pachymerium ferrugineum<br />

(C.L.Koch,1835) from Germany survived 7-68 days at room temperature (16-18 o C)<br />

whilst Suomalainen ( 1939 ) reported 24-95 days at 19-27 o C <strong>and</strong> 68-178 days at 6-12 o C<br />

for Finnish animals. Binyon <strong>and</strong> Lewis ( 1963 ) reported on survival times for animals<br />

immersed in sea-water for Strigamia maritima , Hydroschendyla submarina<br />

Stigmatogaster subterranea with <strong>the</strong> latter having much reduced survival times compared<br />

with <strong>the</strong> two <strong>littoral</strong> species. Th e two halophiles were able to maintain <strong>the</strong>ir body<br />

fl uid concentrations more or less constant for 14 hours whilst in Stigmatogaste r this<br />

rose signifi cantly. Th ere appears to have been little subsequent work on osmoregulation<br />

in <strong>littoral</strong> <strong>centipedes</strong>.<br />

Gaseous exchange<br />

Unlike some spiders which are able to trap bubbles of air in <strong>the</strong>ir nests <strong>and</strong> use <strong>the</strong>se<br />

ei<strong>the</strong>r as a direct resource or as a physical gill or remain in air pockets trapped in some<br />

o<strong>the</strong>r way e.g. in empty barnacle shells (McQueen <strong>and</strong> McLay, 1983 ; Roth <strong>and</strong> Brown,<br />

1975 ; Rovner, 1987 ) <strong>the</strong>re is little clear evidence of geophilomorphs doing this even<br />

though Bonnel ( 1929 ) had reported that Mixophilus indicus (Silvestri, 1929 ) trapped a<br />

bubble of air in a loop in <strong>the</strong> posterior end of its body. Rajalu ( 1972 ) was unable to<br />

confi rm this <strong>and</strong> as Lewis ( 1962 ) pointed out, although newly immersed specimens of<br />

Strigamia maritima have bubbles of air on <strong>the</strong>ir surface <strong>the</strong>se are likely to be rapidly<br />

dispersed by movement. Nor is <strong>the</strong>re any evidence of <strong>centipedes</strong> occupying air fi lled<br />

burrows. However <strong>the</strong>re have been suggestions that air bubbles could be trapped in<br />

spiracles <strong>and</strong> might act as physical gills (Laloy, 1904 ; Suomalainen, 1939 ) <strong>and</strong> <strong>the</strong>re is<br />

some evidence for this (Lewis, 1960).<br />

Alternatively ei<strong>the</strong>r <strong>the</strong> general body surface or some part of it might allow gaseous<br />

exchange directly with sea water (Rajalu, 1972 ). Manton ( 1965 ) argued that closure of<br />

<strong>the</strong> spiracular atrium when burrowing allowed respiration to continue <strong>and</strong> that <strong>the</strong><br />

atrial cuticle facilitated respiration under wet soil (<strong>and</strong> hence, possibly, sea water)<br />

conditions.<br />

Tolerance of more or less severe hypoxia in insects (which would be advantageous<br />

during submergence) is greater than in most vertebrates (Hoback <strong>and</strong> Stanley, 2001 ;<br />

Schmitz <strong>and</strong> Harrison, 2004 ) <strong>and</strong> <strong>the</strong> apparent capacity of at least some <strong>centipedes</strong> to<br />

build up an oxygen debt which is subsequently “paid off ” is indicated by experiments<br />

with Mixophilus indicus (Rajalu, 1970 ). A similar phenomenon has been found when<br />

measuring oxygen consumption in <strong>the</strong> terrestrial lithobiomorph Lithobius agilis (Ivan<br />

Kos, pers. comm.)<br />

Problems of defi ning halophiles<br />

One of <strong>the</strong> problems associated with gaining a clear picture of <strong>the</strong> variety <strong>and</strong> numbers<br />

of shoreline animal species is that of defi nition of <strong>the</strong> terms “<strong>littoral</strong>” <strong>and</strong> “sea shore”<br />

which, in some accounts, can include areas of l<strong>and</strong> close to <strong>the</strong> beach itself. For instance,<br />

<strong>and</strong>


A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39 25<br />

Ivinskis <strong>and</strong> Rimšaitė ( 2005 ) in a study of <strong>the</strong> Curonian Spit <strong>and</strong> Klaipėda-Šventoji<br />

zone refer to “seashore <strong>habitat</strong>s” in which <strong>the</strong>y included dunes, dry grassl<strong>and</strong>s <strong>and</strong> s<strong>and</strong><br />

heaths (<strong>and</strong> recorded 2,000 species of insects). Correspondingly “Littoral Méditerranéan”<br />

as used by Brölemann ( 1930 ) when describing some geophilomorph species seems to<br />

refer to that particular region of France ra<strong>the</strong>r than to specifi cally <strong>littoral</strong> <strong>habitat</strong>s as we<br />

might underst<strong>and</strong> <strong>the</strong>m.<br />

In this account we will take <strong>the</strong> term to refer to species found in locations close to<br />

high water line <strong>and</strong> below. Including <strong>the</strong> supra<strong>littoral</strong> zone would substantially increase<br />

<strong>the</strong> number of species as more “terrestrial” forms are found but <strong>the</strong> line between <strong>littoral</strong><br />

<strong>and</strong> supra-<strong>littoral</strong> species is necessarily blurred. Lewis ( 1962 ), when describing <strong>the</strong><br />

ecology, distribution <strong>and</strong> taxonomy of <strong>the</strong> <strong>centipedes</strong> on <strong>the</strong> shore in <strong>the</strong> Plymouth<br />

area, includes four species that we might regard as typically <strong>littoral</strong> [ Hydroschendyla<br />

submarina , Schendyla peyerimhoffi (Brölemann <strong>and</strong> Ribaut, 1911), Strigamia maritima ,<br />

Geophilus seurati (Brölemann, 1924; Figure 4 )], a species which occurs both on <strong>and</strong> off<br />

<strong>the</strong> shore ( Geophilus fl avus ) <strong>and</strong> one, Stenotaenia linearis (C. L. Koch, 1835), which is<br />

usually regarded as terrestrial <strong>and</strong> was found at high water mark.<br />

In addition to <strong>the</strong> problem of defi nition, <strong>littoral</strong> <strong>habitat</strong>s are, by <strong>the</strong>ir nature, often<br />

diffi cult to sample, whe<strong>the</strong>r shingle, saltmarsh, s<strong>and</strong>, mud, mangroves or transitory<br />

drift lines <strong>and</strong> in addition to <strong>the</strong> physical diffi culties in extracting <strong>littoral</strong> species from<br />

<strong>the</strong>ir substrate some appear to have discontinuous distribution patterns <strong>and</strong> even<br />

within a particular location, possibly because of micro-variation in environmental<br />

conditions, <strong>the</strong>y may show a patchy occurrence. Th ese toge<strong>the</strong>r with tidal, seasonal or<br />

Figure 4. Geophilus seurati Brölemann, 1924 (= G.gracilis Meinert, 1898) from under a stone on a salt<br />

marsh, Gower Peninsula, Wales.


26 A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39<br />

wea<strong>the</strong>r induced local migration can sometimes make it surprisingly diffi cult to fi nd<br />

<strong>littoral</strong> species in apparently suitable sites.<br />

Categories of halophiles<br />

Th ere are clearly <strong>and</strong> distinctly recognised halophilic species such as <strong>the</strong> European<br />

Hydroschendyla submarina which are only found on shores below or around high water<br />

line <strong>and</strong> which will be likely to experience submersion at high tide but species found<br />

on <strong>the</strong> shore may also include typical “terrestrial” ones that happen also to occur sometimes<br />

on <strong>the</strong> shore during chance foraging but are not specifi cally associated with it<br />

<strong>and</strong> this could include a very wide range of types. Th ere are also species that do commonly<br />

occur on <strong>the</strong> shore <strong>and</strong> are characteristically found <strong>the</strong>re but also occur inl<strong>and</strong><br />

such as Pachymerium ferrugineum widespread across Europe <strong>and</strong> elsewhere but regularly<br />

found in beach shingle or o<strong>the</strong>r <strong>littoral</strong> sites e.g. in Finl<strong>and</strong> (Palmén, 1949 ).<br />

Silvestri ( 1903 ) distinguished <strong>the</strong>se three categories as miriopodi halofi li genuini ,<br />

miriopodi halofi li accidentali <strong>and</strong> miriopodi halofi li indiff erenti <strong>and</strong> <strong>the</strong>se remain useful<br />

concepts. Unfortunately <strong>the</strong>re are many species described which, one suspects, could<br />

be <strong>littoral</strong> but lack detailed <strong>habitat</strong> data. Th ere are o<strong>the</strong>rs where <strong>the</strong>re are so few records,<br />

possibly only a single one so that it is impossible to which of Silvestri’s categories <strong>the</strong><br />

apparently <strong>littoral</strong> species might be allocated. Th ere are also animals which appear to<br />

be genuine halophiles in one region but have been found inl<strong>and</strong> elsewhere. Examples<br />

of <strong>the</strong> latter include Schendyla peyerimhoffi <strong>and</strong> Schendyla monodi (Brölemann, 1924),<br />

both apparently exclusively halophilic in NW Europe but which have been recorded<br />

inl<strong>and</strong> in Iberia.<br />

Th e range of species <strong>and</strong> <strong>the</strong>ir known geographical distribution<br />

Littoral geophilomorphs, whe<strong>the</strong>r genuini , indiff erent i or possibly accidentali have<br />

been described from many seashores, sometimes only once but <strong>the</strong>re are areas of <strong>the</strong><br />

world such as much of Asia, sub-Saharan Africa <strong>and</strong> <strong>the</strong> Atlantic coast of North<br />

America which are poor in known species, possibly due to lack of collection <strong>and</strong> identifi<br />

cation from suitable sites or lack of suitable <strong>habitat</strong>s. Th e present list ( Tables 1, 2a,<br />

<strong>and</strong> 2b ) is based on <strong>the</strong> literature, mostly as summarised with <strong>the</strong> relevant references in<br />

a previous paper by <strong>the</strong> present author (Barber, 2009a ) where are also listed o<strong>the</strong>r possible<br />

<strong>littoral</strong> species for which <strong>the</strong>re is inadequate <strong>habitat</strong> data. In <strong>the</strong> tables <strong>the</strong> probable<br />

status is indicated on <strong>the</strong> basis of known ecological data (G = genuini , I = indiff erenti ,<br />

R = <strong>littoral</strong> in one region, inl<strong>and</strong> in ano<strong>the</strong>r) but it is quite possible that some of <strong>the</strong><br />

myriopodi halofi li genuini may turn out to be indiff erenti or even accidentali .<br />

It is also possible that not all species names are valid ei<strong>the</strong>r because of synonymy or<br />

lack of clarity as to whe<strong>the</strong>r <strong>the</strong> name is being correctly applied. In an example of <strong>the</strong><br />

latter, Chamberlin ( 1909 ) described a new species Pectiniunguis heathi (now known as<br />

Nyctunguis heathi ) as up to 22mm <strong>and</strong> from a shell mound near Cypress Point, Montery<br />

County, California without actually indicating whe<strong>the</strong>r this was a shoreline site.


A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39 27<br />

Table 2a. Littoral geophilomorph species <strong>and</strong> <strong>the</strong>ir recorded distribution: Families Mecistocephalidae,<br />

Schendylidae, Ballophilidae, Linotaeniidae, Dignathodontidae, <strong>and</strong> Aphilodontidae. Based on data in<br />

Barber, 2009a.<br />

FAMILY <strong>and</strong> Species Distribution Status Note<br />

MECISTOCEPHALIDAE<br />

Mecistocephalus manazuensis Shinohara, 1961 Japan ? I 1<br />

Mecistocephalus satumensis Takano, 1980<br />

SCHENDYLIDAE<br />

Japan G<br />

Hydroschendyla submarina Grube, 1872 Mediterranean, N.Atlantic<br />

(Sc<strong>and</strong>inavia–N.Africa),<br />

Bermuda<br />

G<br />

Nyctunguis heathi (Chamberlin, 1909 ) California ?G 2<br />

Pectiniunguis albermarlensis Chamberlin, 1914 Galápagos Isl<strong>and</strong>s I<br />

Pectiniunguis americanus Bollman, 1889 Gulf of California ?I<br />

Pectiniunguis amphibius Chamberlin, 1923 Gulf of California, Florida,<br />

Mexico<br />

G<br />

Pectiniunguis bollmani Pereira et al, 1999 Venezuela G<br />

Pectiniunguis halirrhytus Crabil, 1959 Florida, Mexico G<br />

Pectiniunguis krausi Shear <strong>and</strong> Peck, 1992 Galápagos Isl<strong>and</strong>s I<br />

Schendyla monodi (Brölemann, 1924) France<br />

Inl<strong>and</strong> in Spain<br />

R 3<br />

Schendyla peyerimhoffi (Brölemann <strong>and</strong> Great Britain, Irel<strong>and</strong>, France R<br />

Ribaut, 1911)<br />

Inl<strong>and</strong> in Portugal, Algeria<br />

Schendylops virgingordae Crabill, 1960 Virgin Gorda, Martinique,<br />

Venezuela<br />

G<br />

Th indyla <strong>littoral</strong>is (Kraus, 1954)<br />

BALLOPHILIDAE<br />

Peru G<br />

Ballophilus riveroi Chamberlin, 1950 Tortola (W.I.) ?I 4<br />

Caritohallex minirrhopus Crabill, 1960<br />

LINOTAENIIDAE<br />

Tortola (W.I.) G<br />

Strigamia maritima (Leach, 1817 ) Sc<strong>and</strong>inavia – N. France<br />

Great Britain <strong>and</strong> Irel<strong>and</strong><br />

G<br />

Strigamia japonica (Verhoeff , 1935 )<br />

DIGNATHODONTIDAE<br />

Japan G<br />

Henia bicarinata (Meinert, 1870)<br />

APHILODONTIDAE<br />

Mediterranean, Macaronesia,<br />

Canary Isl<strong>and</strong>s<br />

I<br />

Aphilodon maritimus (Lawrence, 1963) South Africa ?G 5<br />

Status: G = genuini , I = indiff erenti , R = <strong>littoral</strong> in one region, inl<strong>and</strong> in ano<strong>the</strong>r.<br />

Notes:<br />

1. May be synonymous with M. nannocornis Chamberlin, 1920, most records of which are non-coastal<br />

(Uliana et al., 2007 ).<br />

2. See comment about this species.<br />

3. May be synonymous with S. viridis (Verhoeff , 1951).<br />

4. Male agreeing with this description collected at same time by same method as C. minirrhopus.<br />

5. Included on basis of name <strong>and</strong> location but not specifi cally identifi ed as <strong>littoral</strong>.


28 A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39<br />

Table 2b. Littoral geophilomorph species <strong>and</strong> <strong>the</strong>ir recorded distribution: Family Geophilidae. Based on<br />

data in Barber, 2009a <strong>and</strong> named sources.<br />

Species Distribution Status Note<br />

Erithophilus neopus Cook, 1889 Florida ?I 1<br />

Geophilus admarinus Chamberlin, 1952 Alaska G<br />

Geophilus algarum Brölemann, 1909 France (north <strong>and</strong> west coasts) G 2<br />

Geophilus becki Chamberlin, 1951 California G<br />

Geophilus fl avus (De Geer, 1778) Widespread in Europe,<br />

Newfoundl<strong>and</strong>, North America<br />

I<br />

Geophilus fucorum Brolemann, 1909 Mediterranean G 2<br />

Geophilus proximus C.L. Koch, 1847 Central <strong>and</strong> Nor<strong>the</strong>rn Europe<br />

Fennosc<strong>and</strong>ia, White Sea<br />

3<br />

Geophilus pusillifrater Verhoeff , 1898 Great Britain, Irel<strong>and</strong>, Brittany<br />

Inl<strong>and</strong> in Herzegovina<br />

R 4<br />

Geophilus seurati Brölemann, 1924 Great Britain, Irel<strong>and</strong>, Brittany<br />

G 2, 5<br />

(= G. gracilis Meinert, 1898)<br />

Mediterranean (North Africa), USA<br />

Geophilus terranovae Palmén, 1954 Newfoundl<strong>and</strong> 6<br />

Lionyx hedgepethi Chamberlin, 1960 California G<br />

Maoriella ecdema Crabill, 1964 Chatham Isl<strong>and</strong> (New Zeal<strong>and</strong>) ?G 7<br />

Mixophilus indicus (Silvestri, 1929 ) India G<br />

Pachymerium ferrugineum<br />

Europe, North Africa, Taiwan,<br />

I 8<br />

(C.L.Koch, 1835)<br />

Hawai’i, Japan, North America, etc.<br />

Polycricus bredini (Crabill, 1960 ) Tortola (West Indies) ?G 9<br />

Tretecthus uliginosus (von Porat, 1894) Cameroun G<br />

Tuoba ashmoleorum (Lewis, 1996 ) Ascension Isl<strong>and</strong> ?G<br />

Tuoba japonicus (Fahl<strong>and</strong>er, 1934) Japan G<br />

Tuoba kozuensis Takakuwa, 1934 Japan G<br />

Tuoba laticeps Pocock, 1901 Australia (Western Australia, Tasmania) G<br />

Tuoba <strong>littoral</strong>is (Takakuwa, 1934) Japan G<br />

Tuoba pallida Jones, 1998 Western Australia G<br />

Tuoba posedonis (Verhoeff , 1901) Mediterranean, Dead Sea, Red Sea G<br />

Tuoba sudanensis (Lewis, 1963) Sudan G<br />

Tuoba sydneyensis (Pocock, 1891) Australia, New Caledonia, New Britain, G / I 10<br />

Solomon Isl<strong>and</strong>s, Hawai’i<br />

Tuoba tiosanus Takakuwa, 1934 Japan, Micronesia ?G<br />

Tuoba xylophaga (Attems, 1903) New Zeal<strong>and</strong> G<br />

Status: G = genuini , I = indiff erenti , R = <strong>littoral</strong> in one region, inl<strong>and</strong> in ano<strong>the</strong>r.<br />

Notes:<br />

1. Included on advice of L. A. Pereira.<br />

2. See comment about <strong>the</strong>se species.<br />

3. Littoral in Fennosc<strong>and</strong>ia (Palmén, 1949 ), White Sea (along with P. ferrugineum ; Prziboro, 1994 <strong>and</strong><br />

pers. comm.).<br />

4. Described originally from inl<strong>and</strong> site in Herzegovina.<br />

5. Th ere is a record of Geophilus gracilis from New Haven, Connecticut (Harger, 1872 ).<br />

6. A number of seashore records, mostly or entirely above high water mark (Palmén, 1954 ).<br />

7. Under stones, high water mark (Crabill, 1964 ).<br />

8. Pachymerium idium Chamberlin, 1960 was taken in a rock fi ssure kept moist by spray but not covered<br />

by high tide, California (Chamberlin, 1960 ).<br />

9. Berlese sifting of beach drift.<br />

10. Occurs up to 950m in Hawai’i.


A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39 29<br />

Evans ( 1980 ) in an accounts of <strong>littoral</strong> arthropods from California describes this species<br />

as occurring “in crevices <strong>and</strong> on <strong>the</strong> surfaces of rocks at night during low tide” <strong>and</strong><br />

up to 45 mm long <strong>and</strong> in a similar record of its occurrence on <strong>the</strong> shore by Ricketts et<br />

al ( 1985 ) it is described as “common”. A photograph in <strong>the</strong> book Living Invertebrates<br />

(Pearse et al, 1987 ) shows a 50 mm specimen identifi ed as N. heathi . In relation to this,<br />

Hoff man <strong>and</strong> Carlton ( 2007 ) commented that “Th e identifi cation of any schendylid<br />

should be approached with caution however <strong>and</strong> <strong>the</strong> identity of Chamberlin’s species<br />

with intertidal <strong>centipedes</strong> may bear re-examination”.<br />

In <strong>the</strong> case of Geophilus fucorum Brölemann, 1909, Geophilus seurati Brölemann,<br />

1924 (= Geophilus fucorum seurati Brölemann, 1924, also known as G. gracilis Meinert,<br />

1898), Geophilus algarum Brölemann, 1909, <strong>and</strong> G. algarum decipiens Brölemann,<br />

1930 , <strong>the</strong>re are issues relating to taxonomy / nomenclature <strong>and</strong> to variability within<br />

<strong>and</strong> this group (Lewis, 1962 ) <strong>and</strong> examination of fur<strong>the</strong>r specimens from both <strong>the</strong><br />

British <strong>and</strong> French coasts would be helpful.<br />

Orphnaeus brevilabiatus (Newport, 1845) (Family Oryidae) is included in a list of<br />

<strong>littoral</strong> species by Roth <strong>and</strong> Brown ( 1976 ) who quote Crabill (pers.comm.) describing<br />

it as being found in “cocoon-like structures” on twigs fl oating or awash on beaches.<br />

It is a species widespread in <strong>the</strong> tropics <strong>and</strong> if this is <strong>the</strong> case <strong>the</strong>n this might be a way<br />

in which it is dispersed <strong>and</strong> it might be considered an indiff erent halophile.<br />

Stigmatogaster subterranea (Family Himantariidae) a north-west <strong>and</strong> central European<br />

terrestrial <strong>and</strong> often synanthropic species has sometimes been found on <strong>the</strong> upper<br />

shore in company with Strigamia maritima or Geophilus seurati on <strong>the</strong> western coast of<br />

Great Britain (personal observations) ( Figure 3 ). Th is is despite <strong>the</strong> fact that it has a low<br />

survival time in seawater (Binyon <strong>and</strong> Lewis, 1963 ).<br />

Hydroschendyla submarina occurs on <strong>the</strong> eastern Atlantic coast from Sc<strong>and</strong>inavia to<br />

North Africa in crevices at or below high water mark <strong>and</strong> in <strong>the</strong> Mediterranean (France,<br />

Greece, Italy <strong>and</strong> North Africa) from where it is recorded under str<strong>and</strong>ed remains of<br />

Posidonia <strong>and</strong> near salt marshes. It is also known from Bermuda in crevices in <strong>the</strong> upper<br />

intertidal <strong>and</strong> low supra-<strong>littoral</strong>. Lewis ( 1962 , 1981 ) contrasted its behaviour with that<br />

of Strigamia maritima <strong>and</strong> also showed that, having eggs impermeable to sea water<br />

allowed both moulting <strong>and</strong> egg laying in <strong>the</strong> <strong>littoral</strong> zone.<br />

Strigamia maritima is recorded from <strong>the</strong> coasts of Sc<strong>and</strong>inavia, Germany, Ne<strong>the</strong>rl<strong>and</strong>s,<br />

Belgium, Britain, Irel<strong>and</strong> <strong>and</strong> nor<strong>the</strong>rn France. Bergesen et al. (2006) recorded it for<br />

<strong>the</strong> fi rst time for North Norway (under stones in <strong>the</strong> supra<strong>littoral</strong> amongst isopods,<br />

Porcellio scaber ) whilst Hornel<strong>and</strong> <strong>and</strong> Meidell ( 1986 ) were able to collect “several<br />

thous<strong>and</strong>s of specimens” from an isl<strong>and</strong> north of Bergen. It is often extremely abundant<br />

in favourable situations with large numbers under individual stones, a situation<br />

that seems to be paralleled by Geophilus becki according to Habermann (1982). Habitats<br />

for S.maritima include shingle, under rocks <strong>and</strong> stones <strong>and</strong> in rock crevices. Th e life<br />

history <strong>and</strong> ecology of this species was studied by Lewis (1960, 1961 ) who related its<br />

behaviour <strong>and</strong> its tolerance of seawater at diff erent stages of its life history to it being a<br />

mobile species, concentrating in areas that are climatically favourable <strong>and</strong> have a good<br />

food supply <strong>and</strong> to its breeding season <strong>and</strong> its ability to migrate up <strong>and</strong> down beaches.


30 A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39<br />

Pachymerium ferrugineum is cited as having coastal areas <strong>and</strong> particularly seashores<br />

as a “preferred” <strong>habitat</strong> at least in nor<strong>the</strong>rn Europe but certainly not being an exclusive<br />

shore species <strong>and</strong> with a wide ecological range, found up to 2,800m asl in <strong>the</strong> Hoggar<br />

Mountains in <strong>the</strong> Sahara (Palmén <strong>and</strong> Rantala, 1954 ). It is possibly one of <strong>the</strong> most<br />

widespread <strong>centipedes</strong> in <strong>the</strong> world <strong>and</strong> is known from Sc<strong>and</strong>inavia, Ne<strong>the</strong>rl<strong>and</strong>s,<br />

Belgium, France, Iberia, Mediterranean region including North Africa, Asia Minor,<br />

Caucasus, Azores, Canaries, Madeira, Taiwan, Japan, Hawai’i, Juan Fern<strong>and</strong>ez, Mexico,<br />

USA, Canada, Alaska, etc. Th ese are certainly not all <strong>littoral</strong> sites <strong>and</strong> in some places<br />

it is no doubt present because of accidental human introduction but its physiological<br />

tolerance certainly suggests <strong>the</strong> possibility of “natural” expansion of its range e.g. by<br />

oceanic rafting to isolated isl<strong>and</strong>s <strong>and</strong> coastal locations. Mediterranean records include<br />

a variety of <strong>habitat</strong>s including <strong>the</strong> seashore <strong>and</strong> in wrack. In <strong>the</strong> Black Sea (Bulgaria) it<br />

is recorded (as var. insulanum ) from under stones, algae <strong>and</strong> Zostera .<br />

In nor<strong>the</strong>rn <strong>and</strong> western Europe its distribution is interesting. It is known from<br />

Norway, Sweden, Finl<strong>and</strong> <strong>and</strong> Denmark <strong>and</strong> from <strong>the</strong> White Sea coast as well as inl<strong>and</strong><br />

in NE Europe. In Eastern Fennosc<strong>and</strong>ia records include from under stones, in decaying<br />

Fucus <strong>and</strong> o<strong>the</strong>r debris on seashores as well as from dry terrestrial sites (Palmén,<br />

1949 ). Meidell ( 1979 ) drew attention to <strong>the</strong> fact that this species <strong>and</strong> Strigamia maritima<br />

form an “east-west pair of species” with S. maritima along <strong>the</strong> western coast <strong>and</strong><br />

P. ferrugineum along <strong>the</strong> eastern coast of sou<strong>the</strong>rn Norway <strong>and</strong> a zone of overlap in<br />

both <strong>the</strong> north <strong>and</strong> south. Bergersen et al . ( 2006 ) did not list it for north Norway. Th e<br />

maps for <strong>the</strong> two species in <strong>the</strong> Encyclopedia of <strong>the</strong> Swedish Fauna <strong>and</strong> Flora (Andersson<br />

et al. , 2005 ; pp. 165 <strong>and</strong> 169) highlight this pattern in <strong>the</strong> Nordic countries.<br />

All records from <strong>the</strong> Ne<strong>the</strong>rl<strong>and</strong>s <strong>and</strong> Belgium appear to be from inl<strong>and</strong> sites<br />

(Berg et al., 2008 , Lock, 2009 ). It has described as widely distributed in France <strong>and</strong><br />

Corsica <strong>and</strong> favouring <strong>the</strong> seashore “without being strictly halobiontic or highly halophilous”<br />

(Geoff roy <strong>and</strong> Iorio, 2009) but <strong>the</strong> only record from <strong>the</strong> nor<strong>the</strong>rn coastal area<br />

seems to be from a seashore dune in Brittany (Iorio, 2005 ). Th e three British records<br />

are all from beach shingle (Barber, 2009b ). Th is would suggest that in this area of<br />

Western Europe it is very much on <strong>the</strong> edge of its European range <strong>and</strong> that maybe<br />

competition with each o<strong>the</strong>r in some way restricts <strong>the</strong> range of P. ferrugineum<br />

<strong>and</strong> S. maritima . Interestingly, Andersson ( 1983 ) noted a substantial decrease in<br />

P. ferrugineum in open rocky terrain, on seashores <strong>and</strong> <strong>the</strong> Nor<strong>the</strong>rn Skerries between<br />

<strong>the</strong> 1920s <strong>and</strong> <strong>the</strong> 1970s in <strong>the</strong> vicinity of Göteborg (Sweden). No explanation of this<br />

decline was suggested.<br />

Characteristics of <strong>littoral</strong> geophilomorphs<br />

Examination of <strong>the</strong> range of <strong>littoral</strong> <strong>Geophilomorph</strong>a reveals an extremely diverse<br />

group of species. For instance, bearing in mind that most measurements are based on<br />

preserved material, recorded body lengths for <strong>littoral</strong> forms vary from 10mm ( Caritohallex<br />

minirrhopus ) to 55mm ( Th indyla <strong>littoral</strong>is , Henia bicarinata ;) <strong>and</strong> leg-bearing<br />

segments from 39 ( Schendyla peyerimhoffi , C. minirrhopus ) to 85 ( H.bicarinata ).


A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39 31<br />

Th e actual number of leg-bearing segments varies slightly as between sexes <strong>and</strong> within<br />

most species (apart from mecistocephalids) but remains constant throughout life. Body<br />

colour varies between pale / semi-transparent through various shades of yellow <strong>and</strong><br />

orangish to reddish-brown with head region often a somewhat darker although colours<br />

often fade in preserved specimens. Mixophilus indicus was described as “light lea<strong>the</strong>r<br />

coloured” by Silvestri ( 1929 ).<br />

Crabill ( 1968 ) drew attention to <strong>the</strong> fact that in <strong>the</strong> genus Tuoba (Geophilidae)<br />

which contains a number of <strong>littoral</strong> species <strong>the</strong>re was a long <strong>and</strong> spiniform pre-tarsal<br />

anterior parunguis (spine) on <strong>the</strong> legs which he regarded as associated with <strong>the</strong> genus’s<br />

distinctively <strong>littoral</strong> preferences <strong>and</strong> which, he suggested, probably functioned as a<br />

special hold-fast adaptation to which Lewis ( 1996 ) added <strong>the</strong> comment that it would<br />

also be useful during transportation. Pereira et al. ( 1999 ) reported on a similar structure<br />

in Pectiniunguis (Schendylidae). O<strong>the</strong>r than this, across <strong>the</strong> various species <strong>and</strong> families,<br />

<strong>the</strong>re seem to be few common characteristics that are obviously related to a <strong>littoral</strong><br />

lifestyle <strong>and</strong> even within a single family <strong>the</strong>re may be marked diff erences between different<br />

<strong>littoral</strong> forms. For instance, in <strong>the</strong> Schendylidae, Hydroschendyla submarina is a<br />

relatively robust reddish brown form up to 40mm long, Schendyla peyerimhoffi is pale<br />

yellow <strong>and</strong> up to 18mm whilst Th indyla <strong>littoral</strong>is is described as yellowish with head<br />

orange <strong>and</strong> up to 55mm long. Closer examination <strong>and</strong> comparison might, perhaps,<br />

identify common features shared by many or all <strong>littoral</strong> forms.<br />

Dispersal <strong>and</strong> isolation<br />

Th eir present world distribution of <strong>littoral</strong> “terrestrial” arthropods such as geophilomorphs,<br />

with often widespread genera <strong>and</strong> species, <strong>the</strong>ir occurrence on isolated isl<strong>and</strong>s<br />

<strong>and</strong> <strong>the</strong>ir presence on both sides of oceans could be accounted for by a number of possible<br />

explanations including continental drift, climate change, transport by birds or<br />

o<strong>the</strong>r animals aerial dispersal, human activity <strong>and</strong> passive transport by water.<br />

With Neotropical geophilomorphs <strong>the</strong>re are suggestions that a few taxa have <strong>the</strong><br />

traits of an old Gondwanan faunal element but <strong>the</strong> bulk of <strong>the</strong> group belong to wideranging<br />

groups, possibly recent immigrants to South America (Pereira et al., 1997 ).<br />

Verhoeff ( 1935 ) when fi rst describing Strigamia japonica , suggested that <strong>the</strong>re might<br />

have once been a continuous occurrence of Strigamia along <strong>the</strong> Siberian coast during<br />

<strong>the</strong> last warm period, later broken up by climate change leading to <strong>the</strong> separation of<br />

<strong>the</strong> European <strong>and</strong> Asian maritime forms.<br />

Transport by birds has been suggested for certain freshwater millipedes (Golovatch<br />

<strong>and</strong> Kime, 2009 ) but <strong>the</strong>re is no defi nite evidence of this being a common mechanism<br />

for dispersing <strong>littoral</strong> arthropods. Also small organisms are always at risk of aerial transport<br />

as dust, etc. is picked up <strong>and</strong> carried in <strong>the</strong> atmosphere, possibly for long distances<br />

but, again, this is probably unlikely for <strong>littoral</strong> <strong>centipedes</strong>. Dispersal by human activity<br />

(anthropochory) is always seen as a way by which animals <strong>and</strong> plants are spread around<br />

<strong>the</strong> world <strong>and</strong> many animals seem to have been dispersed in this way, as for instance,<br />

North American invertebrates (Lindroth, 1957 ), Newfoundl<strong>and</strong> <strong>centipedes</strong> (Palmén,


32 A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39<br />

1954 ) <strong>and</strong> <strong>the</strong> myriapods of St.Helena (Matic <strong>and</strong> Darabantu, 1977 ) all of which<br />

include European species. Crabill ( 1964 ) thought that Maoriella edentatus (Attems,<br />

1947) described from Tahiti (no locality details) might possibly be an aberrant<br />

Maoriella macrostigma Attems 1903 transported from New Zeal<strong>and</strong> by early Polynesian<br />

voyagers; Maoriella is a genus known o<strong>the</strong>rwise only from New Zeal<strong>and</strong> with one species<br />

from Australia. “Terrestrial” (especially soil) animals, especially those associated<br />

with agriculture or similar practices, would seem to be likely to be spread this way<br />

ra<strong>the</strong>r than sea shore organisms although <strong>the</strong> possibility of <strong>the</strong> latter being carried in<br />

ship’s ballast should not be forgotten.<br />

Accidental dispersal by rafting of animals e.g. on plant debris (hydrochory) is certainly<br />

seen as a likely dispersal mechanism, for animals <strong>and</strong> <strong>littoral</strong> species are in an<br />

optimum situation for this, both in terms of being accidentally carried away <strong>and</strong> of<br />

establishing <strong>the</strong>mselves when <strong>the</strong>y arrive at a suitable destination. Suomalainen ( 1939 )<br />

had reported on Pachymerium ferrugineum fl oating on sea water for as long as 31 days<br />

before sinking <strong>and</strong> long survival when submerged in such water. Anecdotally, Nesrine<br />

Akkari ( pers. comm .) described how a live Pachymerium ferrugineum was taken directly<br />

in a l<strong>and</strong>ing net from <strong>the</strong> water in a shallow lagoon in Tunisia by a colleague who was<br />

collecting mosquito larvae. Interestingly, this species is probably tone of <strong>the</strong> most widespread<br />

<strong>centipedes</strong> in <strong>the</strong> world. Fossil evidence suggests that rafting occurred in palaeooceans<br />

<strong>and</strong> during recent centuries <strong>the</strong> composition <strong>and</strong> abundance of fl oating items<br />

has been strongly aff ected by human activities; it is suggested that rafting continues to<br />

be an important dispersal in present-day oceans (Th iel <strong>and</strong> Gutow, 2004 ).<br />

Th ere is, in fact, very limited quantitative data on <strong>the</strong> extent to which even insects<br />

actually survive as drifters <strong>and</strong> most studies on animals spreading by rafting concentrate<br />

on marine species (e.g. Th iel <strong>and</strong> Gutow, 2005 ). Drifting vegetation has been<br />

found up to 16km off shore which supported many insects although only 25% of it had<br />

living terrestrial animals <strong>and</strong> no living insects were found in vegetation collected 160km<br />

off shore (although colonies of ants have been reported in drifting wood) (Bowden <strong>and</strong><br />

Johnson, 1976 ). Even if <strong>the</strong> chances of survival are small, <strong>the</strong> possibility remains for<br />

transport in this way. Th e pseudoscorpion Apocheiridium pelagicum Redikorzev, 1938<br />

was fi rst collected 200 miles (320km) at sea in plankton nets; its <strong>habitat</strong> is in reefs<br />

constantly submerged by <strong>the</strong> sea (Roth <strong>and</strong> Brown, 1976 ). Th e fact that heteropterous<br />

bugs ( Halobates spp.) can live on <strong>the</strong> surface of <strong>the</strong> open ocean suggests also that <strong>the</strong>re<br />

is no fundamental reason why arthropods of terrestrial origin should not be able to<br />

survive in this environment for a period of time <strong>and</strong> be dispersed over wide distances.<br />

Crabill ( 1960 ) discussed <strong>the</strong> issue of rafting as a means of distribution of <strong>centipedes</strong><br />

referring to Caritohallex minirrhopus , Balophilus riveroi <strong>and</strong> Schendylus virgingordae collected<br />

in West Indian beach drift <strong>and</strong> to specimens of Pectiniunguis from seaweed on a<br />

beach in Florida Key. He thought that animals might not be “discomfi ted much or at<br />

all perhaps” in <strong>the</strong> wood or under <strong>the</strong> bark of fl oating trees or bushes <strong>and</strong> suggesting<br />

that, although many, perhaps <strong>the</strong> majority, would perish, over <strong>the</strong> immense length of<br />

time <strong>and</strong> <strong>the</strong> millions of such voyages that were begun, many must have reached l<strong>and</strong><br />

<strong>and</strong> survived. He went on to comment that “during <strong>the</strong> immense stretches of time of<br />

<strong>the</strong> past some <strong>centipedes</strong> – <strong>the</strong>y may well have been Schendylidae – made <strong>the</strong> journey


A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39 33<br />

successfully <strong>and</strong> this explanation reasonably accounts for <strong>the</strong> presence in Africa <strong>and</strong><br />

South America of many, but of course not all, congeneric or conspecifi c <strong>centipedes</strong>”.<br />

Th is hypo<strong>the</strong>sis was supported by Pereira <strong>and</strong> Minelli ( 1993 ) <strong>and</strong> Pereira et al. ( 1997 ),<br />

<strong>the</strong> latter writing “Th ere is a single specimen of Schendylops in <strong>the</strong> Natural History<br />

Museum in London, too damaged for allow for confi dent specifi c identifi cation, but<br />

good enough to allow a confi dent identifi cation as a member of a genus occurring,<br />

with many species, on both sides of <strong>the</strong> Atlantic. Th is specimen was collected long ago<br />

from Ascension Isl<strong>and</strong>, midway between Africa <strong>and</strong> South America, along <strong>the</strong> route<br />

of <strong>the</strong> westbound South Equatorial Current”.<br />

On both a local <strong>and</strong> a global scale, <strong>the</strong> varied nature of coasts will be likely to break<br />

up species into a series of isolated populations which would favour genetic divergence.<br />

Dispersal across oceans <strong>and</strong> to isolated isl<strong>and</strong>s would accentuate this eff ect. Th is may<br />

be refl ected in variations in characters between populations at diff erent sites.<br />

<strong>Geophilomorph</strong>s are convenient animals in which to study such diff erences by looking<br />

at variation of numbers of leg-bearing segments at particular locations as described by<br />

Lewis ( 1962 ) for Strigamia maritima <strong>and</strong> Shinohara ( 1961 ) for Tuoba <strong>littoral</strong>is . Arthur<br />

<strong>and</strong> Kettle ( 2000 ) demonstrated a latitudinal cline in segment number in Strigamia<br />

maritima in Britain, suggesting that climatic selection <strong>and</strong> local adaptation could be<br />

responsible; Vedel et al. ( 2008 ) showed that, in laboratory experiments, temperature<br />

regime infl uences <strong>the</strong> number of leg-bearing segments that develop in this species <strong>and</strong><br />

which could provide an explanation for this phenomenon.<br />

Conclusions<br />

It can be seen that <strong>the</strong>re is a wide diversity of species of <strong>littoral</strong> <strong>centipedes</strong> around <strong>the</strong><br />

world but with obvious <strong>and</strong> sometimes surprising gaps in our knowledge including <strong>the</strong><br />

shortage of records from <strong>the</strong> coasts of eastern North America, most of Africa including<br />

South Africa <strong>and</strong> large parts of Asia. Th ere are also <strong>littoral</strong> <strong>centipedes</strong>, presumably<br />

geophilomorphs, reported in <strong>the</strong> literature from a variety of locations when, apparently,<br />

no identifi cation was made or specimens kept e.g. Cape Verde Isl<strong>and</strong>s, Galapagos<br />

(Crossl<strong>and</strong>, 1929 ), Colombia, Panama, Costa Rica (Polhemus <strong>and</strong> Evans, 1969 ),<br />

North America (Hoff man <strong>and</strong> Carlton, 2007 ). Th ere may also be described species<br />

that have been missed in this survey.<br />

On northwestern European coasts alone <strong>the</strong>re are at least eight or so genuini or indifferenti<br />

species described (depending on taxonomic issues, etc.) <strong>and</strong> <strong>the</strong> number from<br />

Japanese shores is comparable. It would be surprising if such relative species richness<br />

was not replicated in at least some o<strong>the</strong>r regions <strong>and</strong> that areas from which only one or<br />

two or no species have been described are probably in many cases much under recorded.<br />

It seems highly likely, <strong>the</strong>refore, that <strong>the</strong>re are fur<strong>the</strong>r, as yet undescribed, <strong>littoral</strong><br />

geophilomorphs <strong>and</strong>/or a wider distribution of known species than has already been<br />

recorded.<br />

What we have is a somewhat incomplete picture but one that suggests that, wherever<br />

conditions are favourable (outside <strong>the</strong> polar regions), seashore geophilomorphs are


34 A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39<br />

likely to be found on coastlines around <strong>the</strong> world. Fur<strong>the</strong>rmore, <strong>the</strong>ir apparent tolerance<br />

of seawater would facilitate dispersal e.g. by rafting across oceans <strong>and</strong> a widespread<br />

distribution may be <strong>the</strong> eff ect of this ra<strong>the</strong>r than by accidental human transmission.<br />

What is very noticeable is that <strong>littoral</strong> species are not confi ned to one genus or family;<br />

some are in monotypic genera, o<strong>the</strong>rs in genera with many species. Table 3 lists<br />

genera with numbers of valid species listed in Chilobase ( http://chilobase.bio.unipd.it )<br />

<strong>and</strong> numbers of halophilic species. For all <strong>the</strong> reasons already mentioned, numbers are<br />

only approximate <strong>and</strong>, in addition, defi nitions/descriptions of genera <strong>and</strong> species are<br />

open to revision but this gives us a crude idea of <strong>the</strong> relative numbers of species in<br />

diff erent genera.<br />

Divergence between <strong>the</strong> centipede orders seems to date from <strong>the</strong> Silurian <strong>and</strong> early<br />

Devonian with familial divergences also almost wholly Palaeozoic (Murienne et al.,<br />

2010). As modern families, genera <strong>and</strong> species have evolved certain forms in some of<br />

<strong>the</strong>se have come to inhabit halophilic <strong>habitat</strong>s ei<strong>the</strong>r in addition to <strong>the</strong>ir more terrestrial<br />

ones or on an apparently obligate basis. As well as <strong>the</strong> monotypic genera (which<br />

would be derived from terrestrial ones) <strong>and</strong> doubtful halophiles, a dozen genera include<br />

one or more halophilic species suggesting that, within each of <strong>the</strong>se genera, certain<br />

species have become ecologically specialised as inhabitants of <strong>the</strong> <strong>littoral</strong> zone. If this is<br />

<strong>the</strong> case, <strong>and</strong> assuming that this has happened independently in each genus (possibly<br />

more than once), <strong>the</strong>n <strong>the</strong> adoption of <strong>the</strong> halophilic habit by some geophilomorphs<br />

Table 3. Genera with known halophilic species, <strong>and</strong> <strong>the</strong>ir relative number.<br />

Family Genus Number of species<br />

in genus<br />

Halophile<br />

species (s. l.)<br />

Percentage<br />

Mecistocephalidae Mecistocephalus 131 2 1.5<br />

Schendylidae Hydroschendyla 1 1 monotypic<br />

Nyctunguis 17 1 5.9<br />

Pectiniunguis 23 6 26.1<br />

Schendyla 27 2 7.4<br />

Schendylops 58 1 1.7<br />

Th indyla 1 1 monotypic<br />

Ballophilidae Caritohallex 1 1 monotypic<br />

Ballophilus 36 1 2.8<br />

Lintotaeniidae Strigamia 39 2 5.1<br />

Dignathodontidae Henia 18 1 5.6<br />

Geophilidae Erithophilus 1 1 monotypic<br />

Geophilus 136 7 5.1<br />

Lionyx 1 1 monotypic<br />

Maoriella 6 1 16.7<br />

Mixophilus 1 1 monotypic<br />

Pachymerium 22 1 4.5<br />

Polycricus 23 1 4.3<br />

Tuoba 17 11 64.7<br />

Tretecthus 1 1 monotypic<br />

Aphilodontidae Aphilodon 14 ?1 ?7.1


A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39 35<br />

must have happened on a number of occasions since <strong>the</strong> order fi rst appeared.<br />

Th is certainly suggests features of <strong>the</strong> group that, in some way, “pre-adapts” <strong>the</strong>m<br />

for this <strong>habitat</strong> without, apparently, a need for a great deal of morphological (<strong>and</strong> presumably<br />

physiological) specialisation. In some genera, especially large ones such as in<br />

<strong>the</strong> genus Geophilus this colonisation of <strong>the</strong> seashore could have happened several<br />

times. In <strong>the</strong> case of miriopodi indiff erenti <strong>the</strong>re seems to be no real obstacles to <strong>the</strong>m<br />

occupying niches in both truly terrestrial as well as upper shore <strong>habitat</strong>s. For <strong>the</strong> genuin<br />

i, presumably greater specialisation or perhaps competition confi nes <strong>the</strong>m to <strong>the</strong><br />

<strong>littoral</strong> <strong>habitat</strong>. Maybe for those forms apparently halofi li genuini in some areas but<br />

terrestrial in o<strong>the</strong>rs perhaps we should look for ei<strong>the</strong>r specifi c local factors, possible<br />

population diff erences/isolation, taxonomic issues or simply lack of adequate distribution<br />

<strong>and</strong> <strong>habitat</strong> knowledge.<br />

Two genera, Pectiniunguis <strong>and</strong> Tuoba appear to have a relatively high proportion of<br />

halophilic species <strong>and</strong>, interestingly, <strong>the</strong>se are <strong>the</strong> ones identifi ed as having <strong>the</strong> distinctive<br />

pre-tarsal parunguis. Tuoba has often been considered as largely <strong>littoral</strong> genus<br />

(Lewis, 1996 ) <strong>and</strong> of <strong>the</strong> 17 species described, nearly two-thirds are <strong>littoral</strong>. Th e<br />

Australian Tuoba sydneyensis seems to have reached Hawai’i (possibly on drifting material)<br />

<strong>and</strong> maybe has been able to colonise o<strong>the</strong>rwise presumably vacant niches <strong>and</strong><br />

reversed <strong>the</strong> trend, going from essentially <strong>littoral</strong> to terrestrial. It could well be that<br />

o<strong>the</strong>r species have done <strong>the</strong> same.<br />

Acknowledgements<br />

Th e pioneering work of John Lewis both on <strong>littoral</strong> geophilomorphs <strong>and</strong> in his 1981<br />

book set <strong>the</strong> scene from which this account could be built up using a diversity of<br />

sources <strong>and</strong> from many individuals, most of whom are acknowledged in <strong>the</strong> earlier<br />

paper (Barber, 2009a ). To <strong>the</strong>se I would like to add Matty Berg, Martin Cawley, Andrey<br />

Przhiboro, R<strong>and</strong>y Mercurio <strong>and</strong> Irina Zenkova. Also <strong>the</strong> several unknown reviewers<br />

who read <strong>the</strong> fi rst draft of this paper <strong>and</strong> most helpfully pointed out various errors of<br />

emphasis, interpretation <strong>and</strong> typography.<br />

References<br />

Andersson , G . 1983 . Th e Chilopod fauna in <strong>the</strong> vicinity of Göteborg – a comparison between collecting<br />

results obtained in <strong>the</strong> 1920s <strong>and</strong> <strong>the</strong> 1970s . Acta Entomologica Fennica 42 : 9 - 14<br />

Andersson , G. , B. A. Meidell , U. Scheller , J.-Å. Winquist , M. Osterkamp Madsen , P. Djursvol , G. Budd ,<br />

<strong>and</strong> U. Gärdenfors . 2005 . Nationalnyckeln till Sveriges fl ora och fauna. Mångfotingar. Myriapoda.<br />

ArtDatabanken, SLU . Uppsala , Sweden . 351 pp.<br />

Armitage , P. 1982 . Strigamia maritima (Leach) (Chilopoda, <strong>Geophilomorph</strong>a), fi rst record in fresh water.<br />

Entomologists’ Monthly Magagazine 118 : 43 - 44 .<br />

Arthur , W. <strong>and</strong> C. Kettle . 2000 . Latitudinal cline in segment number in an arthropod species, Strigamia<br />

maritima . Proceedings of <strong>the</strong> Royal Society of London B 267 : 1393 - 1397 .<br />

Barber , A. D . 2009a . Littoral myriapods; a review in Myriapoda <strong>and</strong> Onychophora of <strong>the</strong> World –<br />

Diversity, biology <strong>and</strong> importance . Xyl<strong>and</strong>er, W <strong>and</strong> K. Voigtländer (Editors). Soil Organisms 81 (3) :<br />

735 - 760 .


36 A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39<br />

Barber , A. D . 2009b . Centipedes. Linnean Society Synopses of <strong>the</strong> British Fauna (NS) 58. Field Studies<br />

Council. Shrewsbury , Engl<strong>and</strong> , UK . 228 pp.<br />

Berg , M. P. , M. Soesbergen , D. Templeman , <strong>and</strong> H. Wijnhoven . 2008 . Verspreidingsatlas Neder l<strong>and</strong>es<br />

l<strong>and</strong>pissebedden, duizendpoten en miljoenpoten (Isopoda, Chilopoda, Diplopoda). Vrije Universiteit,<br />

Afdeling Dierecologie. Leiden , EIS-Nederl<strong>and</strong> <strong>and</strong> Amsterdam , Th e Ne<strong>the</strong>rl<strong>and</strong>s . 192 pp.<br />

Bergersen , R. , K. M. Olsen , P. Djursvol , <strong>and</strong> A. Nilssen . 2006 . Centipedes (Chilopoda) <strong>and</strong> millipedes<br />

(Diplopoda) in North Norway . Norwegian Journal of Entomology 53 : 23 - 38 .<br />

Binyon , J. <strong>and</strong> J. G. E. Lewis . 1963 . Physiological adaptations of two species of centipede (Chilopoda:<br />

<strong>Geophilomorph</strong>a) to life on <strong>the</strong> shore . Journal of <strong>the</strong> Marine Biological Association of <strong>the</strong> United<br />

Kingdom 43 : 49 - 55 .<br />

Bonnel , B . 1929 . Geophilid <strong>centipedes</strong> from <strong>the</strong> bed of <strong>the</strong> Coum River (Madras) . Journal of <strong>the</strong> Asiatic<br />

Society of Bengal (New Series) 25 : 181 - 4 .<br />

Bowden , J. <strong>and</strong> C. G. Johnson . 1976 . O<strong>the</strong>r intertidal air-breathing arthropods. Migrating <strong>and</strong> o<strong>the</strong>r terrestrial<br />

insects at sea . Chapter 6, pp. 97-118 . In: Marine Insects. Cheng , L. (ed.). North Holl<strong>and</strong><br />

Publishing , Amsterdam. Th e Ne<strong>the</strong>rl<strong>and</strong>s . 581 pp.<br />

Brölemann , H. W. 1930 . Éleménts d’une faune de France Chilopodes . Lechavalier , Paris, France .<br />

405 pp. Also available at : http://www.faunedefrance.org/biblio<strong>the</strong>que/docs/H.W.BROLEMANN<br />

(FdeFr25)Myriapodes-Chilopodes.pdf .<br />

Catenazzi , A. <strong>and</strong> M. A. Donnelly . 2007 . Th e Ulva connection: marine algae subsidize terrestrial predators<br />

in coastal Peru . Oikos 116 : 75 - 86 .<br />

Chamberlin , R. V . 1909 . Some records of North American Geophilidae <strong>and</strong> Lithobiidae. With description<br />

of new species . Annals of <strong>the</strong> Entomological Society of America 11 (3) : 175 - 192 .<br />

Chamberlin , R. V . 1960 . Five new western geophilid chilopods . Proceedings of <strong>the</strong> Biological Society of<br />

Washington 73 : 239 - 244 .<br />

Cheng , L . 1976 . Marine Insects . North Holl<strong>and</strong> Publishing , Amsterdam. Th e Ne<strong>the</strong>rl<strong>and</strong>s . 581 pp.<br />

ChiloBase. (No date) A world catalogue of <strong>centipedes</strong> on line (A. Minelli, Editor) http://chilobase<br />

.bio.unipd.it/ Version 1.01 was dated 2006 but this database is being continuously updated. Note<br />

for <strong>the</strong> reader: if opening this link directly does not seem to work, simply google <strong>the</strong> word<br />

“Chilobase”.<br />

Crabill, R. E. Jr . 1960 . Centipedes of <strong>the</strong> Smithsonian-Bredin expeditions to <strong>the</strong> West Indies . Proceedings<br />

of <strong>the</strong> United States National Museum 111 : 167 - 195 .<br />

Crabill, R. E. Jr . 1964 . A preliminary review of Maoriella , with description of a new species from <strong>the</strong><br />

Chatham Isl<strong>and</strong>s (Chilopoda: <strong>Geophilomorph</strong>a: Chilenophilidae) . Entomological News 75 (4) :<br />

85 - 97 .<br />

Crabill, R. E. Jr . 1968 . On <strong>the</strong> true identities of Tuoba <strong>and</strong> Nesogeophilus (Chilopoda: <strong>Geophilomorph</strong>a:<br />

Geophilidae) . Proceedings of <strong>the</strong> Entomological Society of Washington 70 : 345 .<br />

Crossl<strong>and</strong> , C . 1929 . Amphibious Centipedes . Nature 124 : 794 .<br />

Due , A. D. <strong>and</strong> G. A. Polis . 1985 . Th e biology of Vaejovis <strong>littoral</strong>is Williams, an intertidal scorpion from<br />

Baja California, Mexico . Journal of Zoology London (A) 207 : 563 - 580 .<br />

Evans , W. G. 1980 . Insects, Chilopoda <strong>and</strong> Arachnida: Insects <strong>and</strong> allies . pp. 641-658. In , Morris, R. H. ,<br />

D. P. Abbott , <strong>and</strong> E. C. Haderlie . Th e Intertidal Animals of California . Stanford University Press .<br />

Stanford, California, USA . 690 pp. + xi .<br />

Geoff roy , J-J. <strong>and</strong> E. Iori . 2009 . Th e French centipede fauna (Chilopoda): updated checklist <strong>and</strong> distribution<br />

in mainl<strong>and</strong> France, Corsica <strong>and</strong> Monaco . In: Myriapoda <strong>and</strong> Onychophora of <strong>the</strong> World –<br />

Diversity, biology <strong>and</strong> importance ( Xyl<strong>and</strong>er, W <strong>and</strong> K. Voigtländer , eds). Soil Organisms<br />

81 (3) : 671 - 694 .<br />

Golovatch , S. I. <strong>and</strong> R. D. Kime . 2009 . Millipede (Diplopoda) distributions: A review . In: Myriapoda <strong>and</strong><br />

Onychophora of <strong>the</strong> World – Diversity, biology <strong>and</strong> importance ( Xyl<strong>and</strong>er, W <strong>and</strong> K. Voigtländer ,<br />

eds). Soil Organisms 81 (3) : 565 - 597 .<br />

Haberman , K. L . 1982 . Vertical distribution <strong>and</strong> <strong>habitat</strong> of <strong>the</strong> centipede Geophilus becki in <strong>the</strong> high<br />

intertidal <strong>and</strong> splash zone of Monterey Bay , California . Hopkins Marine Station student paper : Final<br />

papers biology 175H (unpublished).


A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39 37<br />

Harger , O . 1872 . Description of New North American Myriapods . American Journal of Science <strong>and</strong> Arts<br />

(Ser. 3) 4 : 116 - 121 .<br />

Hennings , C . 1903 . Zur Biologie der Myriopoden I Marine Myriopoden . Biologisches Zentralblatt 23 :<br />

720 - 725 .<br />

Hoff man , R. <strong>and</strong> J. T. Carlton . 2007 . Chilopoda pp. 692-693 . In: Light, S.F. <strong>and</strong> J. T. Carlton. Light &<br />

Smith Manual: Intertidal invertebrates from Central California to Oregon . Fourth edition . University<br />

of California Press. Berkley, California , USA . 1001 pp.<br />

Hoback , W. W. <strong>and</strong> D. W. Stanley . 2001 . Insects in hypoxia . Journal of Insect Physiology 47 (6) :<br />

533 - 542 .<br />

Hornel<strong>and</strong> , E. O. <strong>and</strong> B. A. Meidell . 1986 . Th e epimorphosis of Strigamia maritima (Leach, 1817)<br />

(Chilopoda, Geophilidae) . Entomologica Sc<strong>and</strong>inavica 17 : 127 - 129 .<br />

Iorio , E . 2005 . Contribution à la connaissance des chilopodes de Bretagne (Myriapoda, Chilopoda) .<br />

Bulletin du Société Linnéanne du Bordeaux 140 (33) : 149 - 156 .<br />

Ivinskis , P. <strong>and</strong> J. Rimšaitė . 2005 . Baltic seashore as a unique <strong>habitat</strong> for insects . Acta Zoologica Lituanica<br />

15 (2) : 115 - 118 .<br />

Laloy , L . 1904 . Insectes arachnides et myriapods marines . La Nature (Paris) 132 : 154 - 155 .<br />

Leach , W.E . ( 1817 ) Th e Characters of <strong>the</strong> Genera of <strong>the</strong> Class Myriapoda, with Descriptions of some<br />

Species . Zoological Miscellany 3 (12) : 31 - 45 .<br />

Lewis , J. G. E. 1960. Th e life history <strong>and</strong> ecology of <strong>the</strong> <strong>littoral</strong> centipede Strigamia maritima (Leach).<br />

PhD Th esis. University of London (unpublished) . Cited in Lewis , J.G.E . ( 1981 ).<br />

Lewis , J. G. E . 1961 . Th e life history <strong>and</strong> ecology of <strong>the</strong> <strong>littoral</strong> centipede Strigamia (= Scolioplanes ) maritima<br />

(Leach) . Proceedings of <strong>the</strong> Zoological Society of London 117 (2) : 221 - 248.<br />

Lewis , J. G. E . 1962 . Th e ecology, distribution <strong>and</strong> taxonomy of <strong>the</strong> <strong>centipedes</strong> found on <strong>the</strong> shore in <strong>the</strong><br />

Plymouth area . Journal of <strong>the</strong> Marine Biological Association of <strong>the</strong> United Kingdom 42 : 655 - 664 .<br />

Lewis , J. G. E . 1981 . Th e biology of <strong>centipedes</strong> . Cambridge University Press . Cambridge, Engl<strong>and</strong>, UK .<br />

476 pp.<br />

Lewis , J. G. E . 1996 . On a new species of Tuoba from Ascension Isl<strong>and</strong> . Fragmenta Entomologica 28<br />

(1) : 15 - 20 .<br />

Lindroth , C. H . 1957 . Th e Faunal connections between Europe <strong>and</strong> North America. Wiley / Almqqvist<br />

& Wiskell . New York, NY, USA / Stockholm , Sweden . 326 pp.<br />

Little , C . 1983 . Th e colonisation of l<strong>and</strong>: origins <strong>and</strong> adaptations of terrestrial animals . Cambridge<br />

University Press . Cambridge, Engl<strong>and</strong>, UK . 299 pp.<br />

Little , C . 1990 . Th e terrestrial invasion, An ecophysiological approach to <strong>the</strong> origins of l<strong>and</strong> animals .<br />

Cambridge University Press. Cambridge, Engl<strong>and</strong>, UK . 304 pp.<br />

Lock , K . 2009 . Updated checklist of <strong>the</strong> Belgian <strong>centipedes</strong> (Chilopoda) . Entomologie faunistique –<br />

Faunistic Entomology 62 : (1) : 35 - 39 .<br />

McQueen , D. J. <strong>and</strong> C. L. McLay . 1983 . How does <strong>the</strong> intertidal spider Desis marina (Hector) remain<br />

under water for such a long time? New Zeal<strong>and</strong> Journal of Zoology 10 (4) : 383 - 392 .<br />

Manton , S. M . 1965 . Th e evolution of arthropodan locomotory mechanisms 8. Functional requirements<br />

<strong>and</strong> body design in Chilopoda, toge<strong>the</strong>r with a comparative account of <strong>the</strong>ir skeleton-muscular systems<br />

<strong>and</strong> an Appendix on A comparison between burrowing forces of annelids <strong>and</strong> chilopods <strong>and</strong> its<br />

bearing on <strong>the</strong> evolution of <strong>the</strong> arthropodan haemocoel . Journal of <strong>the</strong> Linnean of London (Zoology )<br />

46 (306-7) : 251 - 483 .<br />

Matic , Z. <strong>and</strong> C. Darabantu . 1977 . La faune terrestre de l’Îsle de Sainte-Hélène, Quatrième Partie. Musee<br />

Royal de l’Afrique Centrale,Tervuren, Belgique. Annales-Serie IN-8 o , Sciences Zoologiques 220 :<br />

45 - 359 .<br />

Meidell , B. A . 1979 . Norwegian Myriapoda: Some Zoogeographical Remarks . pp 195-201 . In:<br />

Camatini, M. ( ed.). Myriapod Biology. London, Engl<strong>and</strong> , UK. Academic Press . 456 pp.<br />

Morse , D. H . 1997 . Distribution, movement, <strong>and</strong> activity patterns of an intertidal wolf spider Pardosa<br />

lapidicina population (Araneae, Lycosidae) . Journal of Arachnolog y 25 : 1 - 10 .<br />

Mundel , P. , 1979 . Th e <strong>centipedes</strong> (Chilopoda) of <strong>the</strong> Mazon Creek . pp. 361–378 . In: Nitecki, M. H.<br />

(ed.). Mazon Creek Fossils . Academic Press . New York, NY, USA . 581 pp.


38 A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39<br />

Murienne , J. , G. D. Edgecombe , <strong>and</strong> G. Giribet . 2010 . Including secondary structure, fossils <strong>and</strong><br />

molecular dating in <strong>the</strong> centipede tree of life . Molecular Phylogenetics <strong>and</strong> Evolution 57 : 301 - 313 .<br />

Palmén , E . 1949 . Th e Chilopoda of Eastern Fennosc<strong>and</strong>ia. Annales Zoologicae Societatis . Zoologicae<br />

Botanicae Fennicae ‘Vanamo’ 13 (4) : 1 - 45 .<br />

Palmén , E . 1954 . Survey of <strong>the</strong> Chilopoda of Newfoundl<strong>and</strong>. Archivum Societatis . Zoologicae Botanicae<br />

Fennicae ‘Vanamo’ 8 (2) : 131 - 149 .<br />

Palmén , E. <strong>and</strong> M. Rantala . 1954 . On <strong>the</strong> life history <strong>and</strong> ecology of Pachymerium ferrugineum (C.L.Koch)<br />

(Chilopoda, Geophilidae). Annales Zoologice Societatis . Zoologicae Botanicae Fennicae ‘Vanamo’<br />

16 (3) : 1 - 44 .<br />

Pearse , V. J. , M. Pearse , M. Buchsbaum , <strong>and</strong> R. Buchsbaum , R. 1987 . Living Invertebrates .<br />

Blackwell Scientifi c Press . ( Palo Alto, California, USA ) & Boxwood Press (Pacifi c Grove, California) .<br />

862 pp.<br />

Pereira , L. A. , D. Foddai, <strong>and</strong> A. Minelli . 1997 . Zoogeographical aspects of Neotropical <strong>Geophilomorph</strong>a<br />

(Chilopoda) . Entomologica Sc<strong>and</strong>inavica Supplement 51 : 77 - 86 .<br />

Pereira , L. A. , D. Foddai <strong>and</strong> A. Minelli . 1999 . Pectiniunguis bollmani n.sp. from Corraline Isl<strong>and</strong> Cayo<br />

Sombrero (Venezuela) with notes on P.hallirhytus Crabill, 1959 (Chilopoda: <strong>Geophilomorph</strong>a:<br />

Schendylidae) . Studies in Neotropical Fauna & Environment 34 ( 3 ): 176 - 185 .<br />

Pereira , L. A. <strong>and</strong> A. Minelli , A. 1993 . On two new species of Schendylurus Silvestri 1907 from Venezuela,<br />

with redescription of S. colombianus Chamberlin 1921 <strong>and</strong> S . virgingordae Crabill 1960 (Chilopoda<br />

<strong>Geophilomorph</strong>a Schendylidae). Tropical Zoology , Special Issue 1 : 105 - 123<br />

Pisani , D. , L. L. Poling , M. Lyons-Weiler , S. B. Hedges . 2004 . Th e colonisation of l<strong>and</strong> by animals:<br />

molecular phylogeny <strong>and</strong> divergence times among arthropods . BMC Evolutionary Biology 2 : 1 - 10 .<br />

Plateau , F . 1890 . Les myriopodes marins et la résistance des arthropods a respiration aérienne a la submersion<br />

. Journal de l’anatomie et physiologie normales et pathologiques de l’hommes et des animaux<br />

26 : 236 - 269 .<br />

Polhemus , J. T. <strong>and</strong> W. G. Evans . 1969 . A new genus of intertidal Saldidae from <strong>the</strong> Eastern tropical<br />

Pacifi c with notes on its biology (Hemiptera) . Pacifi c Insects 11 (3-4) : 571 - 578 .<br />

Polis , G. A. <strong>and</strong> S. D. Hurd . 1995 . Extraordinarily high spider densities on isl<strong>and</strong>s: Flow of energy from<br />

<strong>the</strong> marine to terrestrial food webs <strong>and</strong> <strong>the</strong> absence of predation . Proceedings of <strong>the</strong> National<br />

Academy of Sciences of <strong>the</strong> United States 92 (10) : 4382 - 4386.<br />

Polis , G. A. , M. E. Power , <strong>and</strong> G. R. Huxel . (Editors) 2004 . Food webs at <strong>the</strong> l<strong>and</strong>scape level . University<br />

of Chicago Press . Chicago, Illinois, USA . 548 + ix pp.<br />

Przhiboro , A. 1994 . Fauna of terrestrial arthropods of <strong>the</strong> intertidal zone of K<strong>and</strong>alaksha Bay, <strong>the</strong> White<br />

Sea . Unpublished M. Sc . Th esis. St. Petersburg State University . St. Petersburg, Russia . 128 pp. + 128<br />

pp. of supplementary material .<br />

Rajalu , G. S . 1970 . Tracheal pulsation in a marine centipede Mixophilus indicus . Current Science (Indian<br />

Academy of Sciences) 17 : 397 - 398 .<br />

Rajalu , G. S . 1972 . On <strong>the</strong> mode of respiration of an estuarine centipede Mixophilus indicus . Journal of<br />

Animal Morphology <strong>and</strong> Physiology 9 : 181 - 90 .<br />

Ricketts , E. F. , J. Calvin , <strong>and</strong> J. W. Hedgepeth . 1985 . Between Pacifi c Tides . 5 th Edition . Revised by<br />

D. W. Phillips . Stanford University Press, Stanford , California, USA . pp. 652 .<br />

Roth , V. D. <strong>and</strong> W. L. Brown . 1975 . A new genus of Mexican intertidal zone spider (Desidae) with biological<br />

<strong>and</strong> behavioural notes . American Museum Novitates 2568 : 1 - 7 .<br />

Roth , V. D. <strong>and</strong> W. L. Brown . 1976 . O<strong>the</strong>r Intertidal air-breathing arthropods . Chapter 6 , pp. 119-150<br />

In: Cheng , L. (ed.). North Holl<strong>and</strong> Publishing , Amsterdam. Th e Ne<strong>the</strong>rl<strong>and</strong>s . 581 pp.<br />

Rosenberg , J . 2009 . Der Hundertfüßer . Die Neue Brehm-Bücherei 285 . Westarp Wissensschaften,<br />

Hohenwarsleben , Germany . 524 pp.<br />

Rovner , J. S . 1987 . Nests of terrestrial spiders maintain a physical gill: fl ooding <strong>and</strong> <strong>the</strong> evolution of silk<br />

constructions . Journal of Arachnology 14 : 327 - 337 .<br />

Schubart , O . 1929 . Th alassobionte und thalassophile Myriapoda . In: Grimpe, G. <strong>and</strong> E. Wagler (eds).<br />

Tierwelt der Nord- und Ostsee 11 : 1 - 20 .


A.D. Barber / Terrestrial Arthropod Reviews 4 (2011) 17–39 39<br />

Schmitz , A. <strong>and</strong> J. F. Harrison . 2004 . Hypoxic tolerance in air-breathing invertebrates . Respiratory<br />

Physiology & Neurobiology 141 (3) : 229 - 242 .<br />

Selden , P. A. <strong>and</strong> D. Edwards . 1989 . Colonisation of <strong>the</strong> l<strong>and</strong> . Chapter 6. pp. 122-152. In: Allen, K. C.<br />

<strong>and</strong> D. E. G. Briggs (eds). Evolution <strong>and</strong> <strong>the</strong> fossil record . Bellhaven Press , London, Engl<strong>and</strong>, UK &<br />

Smithsonian Institution Press, Washington, District of Columbia, USA. xiii + 265 pp.<br />

Shear , W. A. <strong>and</strong> G. D. Edgecombe . 2010 . Th e geological record <strong>and</strong> phylogeny of <strong>the</strong> Myriapoda .<br />

Arthropod Structure & Development 39 : 174 - 190 .<br />

Shear , W. A. <strong>and</strong> P. A. Selden . 2001 . Rustling in <strong>the</strong> undergrowth; animals in early terrestrial ecosystems<br />

pp. 29-51. In: Gensel, P.A. <strong>and</strong> D. Edwards. Plants invade <strong>the</strong> l<strong>and</strong> . Columbia University Press . New<br />

York, NY, USA . 304 pp.<br />

Shinohara , K . ( 1961 ) Survey of <strong>the</strong> Chilopoda <strong>and</strong> Diplopoda of Manazuru Seashore, Kanagawa<br />

Prefecture, Japan . Science Reports Yokosuka City Museum 6 : 75 - 82 .<br />

Silvestri , F . 1903 . Miriopodi viventi sulla spiaggia del mare presso portici (Napoli) . Annuari del Museo<br />

Zoologico della Universita di Napoli (Nuova Serie) 1 (12) : 1 - 5 .<br />

Silvestri , F . 1929 . Description of a new genus <strong>and</strong> species of Geophilidae (Myriapoda, Chilopoda) from<br />

Madras (India) . Records of <strong>the</strong> Indian Museum (Calcutta ) 31 : 263 - 267 .<br />

Simiakis , S. , A. Minelli , <strong>and</strong> M. Mylonas . 2004 . Th e centipede fauna (Chilopoda) of Crete <strong>and</strong> its<br />

satellite isl<strong>and</strong>s (Greece, Eastern Mediterranean) . Israel Journal of Zoology 50 : 367 - 418 .<br />

Suomalainen , P . 1939 . Zur Verbreitungsökologie von Pachymerium ferrugineum C.Koch (Myriopoda) in<br />

fi nnischen Schärenhof . Annales Zoologici Societatis Zoologicae Botanicae Fennicae ‘Vanamo’ 7 :<br />

10 - 14 .<br />

Th iel , M. <strong>and</strong> L. Gutow , L. 2004 . Th e ecology of rafting in <strong>the</strong> marine environment I: Th e fl oating substrata<br />

. Oceanography & Marine Biology 42 : 181 - 264 .<br />

Th iel , M. <strong>and</strong> L. Gutow . 2005 . Th e ecology of rafting in <strong>the</strong> marine environment II: Th e rafting organisms<br />

<strong>and</strong> community . Oceanography & Marine Biology 43 : 279 - 418 .<br />

Uliana , M. , L. Bonato , <strong>and</strong> A. Minelli . 2007 . Th e Mecistocephalidae of <strong>the</strong> Japanese <strong>and</strong> Taiwanese<br />

Isl<strong>and</strong>s ( Chilopoda : <strong>Geophilomorph</strong>a ). Zootaxa 1396 : 1 - 84.<br />

Vedel , V. , A. D. Chipman , M. Akam , <strong>and</strong> W. Arthur . 2008 . Temperature-dependent plasticity of segment<br />

number in an arthropod species: <strong>the</strong> centipede Strigamia maritima . Evolution & Development<br />

10 (4) : 487 - 492.<br />

Verhoeff , K . 1935 . Über Scolipolanes (Chilopoda) . Zoologischer Anzeiger 111 : 10 - 23 .<br />

Wilson , H. M. <strong>and</strong> L. I. Anderson . 2004 . Morphology <strong>and</strong> taxonomy of Paleozoic millipedes (Diplopoda:<br />

Chilognatha: Archipolypoda) from Scotl<strong>and</strong> . Journal of Paleontology 78 : 169 - 184 .

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