Ambrosiodmus

Type species

Xyleborus tachygraphus Zimmermann

Adapted from Wood 1982, p. 804-809 and Rabaglia 2006

Diagnosis

Ambrosiodmus differs from Xyleborus Eichhoff in having a completely asperateasperate:
of a surface or texture which is rough
pronotum. In North American species the pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
is usually as long as wide, whereas in Xyleborus is longer than wide.

Description

Species in this genus range from 1.8 to 4.9 mm in length and are approximately 2.2 to 2.6 times as long as wide. Their color ranges from yellowish brown to black. As in other Xyleborina they are sexually dimorphicdimorphic:
a structure that occurs in two different forms, such as color, shape, or size
with smaller and flightless males. The pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
is usually as long as wide and completely asperateasperate:
of a surface or texture which is rough
. The scutellumscutellum:
a shield-like bony plate or scale, as on the thorax of some insects
is large and flushed with the surface of the elytraelytra:
the two external and hardened or sclerotized forewings of adult Coleoptera, often appearing leather-like in texture
. The declivitydeclivity:
the apical portion of the beetle elytra that slopes downward
is convex with a few species having a shallow sulcus near the suture; usually has granulesgranules:
a small grain-like elevation
with a few species having tuberclestubercles:
stiff, pointed, tapered processes on the surface of the integument, usually shorter than a spine
. The vestiturevestiture:
a surface covering of scales or setae on the body, wing, or other appendage
consists of erect hair-like setaehair-like setae:
setae that are thin and similar to a hair
all over and shorter, recumbentrecumbent:
applied to setae which lay in the surface of the body
hair-like setaehair-like setae:
setae that are thin and similar to a hair
on the striaestriae:
longitudinally arranged lines often impressed or marked by punctures that are located between the interstriae on the Coleopteran elytron
. The anterior margin of the compound eye is emarginateemarginate:
notched or indented
. The scapescape:
the first and basal segment of the insect's antennae
is usually as long as the 5-segmented funiclefunicle:
the antennal segments located between the scape and the club in some Coleoptera
. The clubclub:
the apical segment of the insect antennae that is enlarged or thickened such that it is anatomically differentiated from the preceding segments
is obliquely truncateobliquely truncate:
pertaining to a structure abruptly and concavely cut
with one recurvedrecurved:
bent backward or downward as a smiley face
suture (two in obliquus) in its posterior faceposterior face:
the side not visible when the club is elevated against the head or visible when the club is down and sensing a surface; it usually has no sutures
. The procoxaeprocoxae:
extra segment occasionally preceding coxa (hip joint) of the first or anterior pair of legs of arthropods
are contiguouscontiguous:
sharing an edge or boundary; touching
.

Distribution

Worldwide

World fauna

Number of species: 94, Native species: 5, Introduced species: 2

Established exotic species

Ambrosiodmus lewisi is present in Pennsylvania.

Ambrosiodmus rubricollis is present in Connecticut, Pennsylvania, Maryland, Delaware, Virginia, Tennessee, South Carolina, Georgia, Alabama, Mississippi, Louisiana, and Florida.

Hosts

Acacia, Acer, Alnus, Carya, Castanea, Cedrela, Citrus, Coffea, Cornus, Dacryodes, Eucalyptus, Fagus, Ficus, Hevea, Juglans, Morus, Persea, Pinus, Populus, Prunus, Rhus, Quercus, Terminalia, among many others