Summary
The ultrastructure of the synapses in the brain of the monogenean Gastrocotyle trachuri (Platyhelminthes) is described. The synapses consist of one presynaptic terminal separated by a uniformly wide synaptic cleft, from one or more postsynaptic elements. The presynaptic terminals are characterized by the presence of paramembranous dense projections and associated synaptic vesicles. The postsynaptic elements while possessing membrane densities, are usually devoid of vesicles.
The structure of the synapses in the brain of Gastrocotyle is compared to synapses from other platyhelminths.
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References
Benshalom G (1979) Ultrastructure of an excitatory synapse. Cell Tissue Res 200:291–298
Best JD, Noel J (1969) Complex synaptic configurations in planarian brain. Science 164:1070–1071
Brooker BE (1972) The sense organs of trematode miracidia. In: Canning EU, Wright CA (eds) Behavioural aspects of parasite transmission. J Linn Soc (Zool) 51, Suppl 1, Academic Press, London, pp 171–180
Chien PK, Koopowitz H (1977) Ultrastructure of nerve plexus in flat-worms. 111. The infra-epithelial nervous system. Cell Tissue Res 176:335–347
Cobb JLS, Pentreath VW (1977) Anatomical studies of simple invertebrate synapses utilizing stage rotation electron microscopy and densitometry. Tissue and Cell 9:125–135
Czubaj A (1979) Ultrastructural distribution of AChE in Catenula leptocephala (Nuttycombe 1956). Histochemistry 61:189–198
Dixon KE, Mercer EH (1965) The fine structure of the nervous system of the cercaria of the liver fluke Fasciola hepatica. J Parasitol 51:967–976
Fournier A (1975) Les taches pigmentaires de l'oncomiracidium d'Euzetrema knoepffleri (Monogenea): ultrastructure et evolution au cours du cycle biologique. Z Parasitenk 46:203–209
Fournier A, Combes C (1978) Structure of photoreceptors of Polystoma integerrimum (Platyhelmintb.es, Monogenea). Zoomorphologie 91:147–155
Govind CK, Chiang RG (1979) Correlation between presynaptic dense bodies and transmitter output at lobster neuromuscular terminals by serial section electron microscopy. Brain Res 161:377–388
Kearn GC (1978) Eyes with, and without, pigment shields in the oncomiracidium of the monogenean parasite Diplozoon paradoxum. Z Parasitenk 57:35–47
Kearn GC, Baker NO (1973) Ultrastructural and histochemical observations on the pigmented eyes of the oncomiracidium of Entobdella soleae, a monogenean skin parasite of the common sole, Solea solea. Z Parasitenk 41:230–254
Koopowitz H, Chien PK (1974) Ultrastructure of the nerve plexus in flatworms. 1. Peripheral organisation. Cell Tissue Res 155:337–351
Koopowitz H, Chien PK (1975) Ultrastructure of nerve plexus in flatworms. 11. Sites of synaptic interactions. Cell Tissue Res 157:207–216
Lentz TL (1967) Fine structure of nerve cells in a planarian. J Morphol 121:323–338
Lyons KM (1972) Sense organs of monogeneans. In: Canning EU, Wright CA (eds) Behavioural aspects of parasite transmission. J Linn Soc (Zool) 51, Suppl 1, Academic Press, London, pp 181–199
Lyons KM (1973) The epidermis and sense organs of the Monogenea and some related groups. Advances in Parasitology 11:193–232
Moraczewski J, Czubaj A, Bakowska J (1977) Organisation and ultrastructure of the nervous system in Catenulida (Turbellaria). Zoomorphologie 87:87–95
Morita M, Best JB (1966) Electron microscopic studies of planaria. 111. Some observations on the fine structure of planarian nervous tissue. J Exp Zool 161:391–412
Morseth DJ (1967) Observations on the fine structure of the nervous system of Echinococcus granulosus. J Parasitol 53:492–500
Myhrberg HE (1972) Ultrastructural localization of monoamines in the central nervous system of Lumbricus terrestris L. with remarks on neurosecretory vesicles. Z Zellforsch 126:348–362
Rees G (1975) The arrangement and ultrastructure of the musculature, nerves and epidermis, in the tail of the cercaria of Cryptocotyle lingua (Creplin) from Littorina littorea (L). Proc Roy Soc Lond, Series B 190:165–186
Reuter M, Lindroos P (1979) The ultrastructure of the nervous system of Gyratrix hermaphroditus (Turbellaria, Rhabdocoela). II. The peripheral nervous system and the synapses. Acta Zool (Stockh.) 60:153–161
Rohde K (1968) Das Nervensystem der Gattung Polystomoides Ward, 1917 (Monogenea). Z Morphol Tiere 62:58–76
Rohde K (1972) Ultrastructure of the nerves and sense receptors of Polystomoides renschi Rohde and P. malayi Rohde (Monogenea, Polystomoidae). Z Parasitenk 40:307–320
Silk MH, Spence IM (1969) Ultrastructural studies of the blood fluke Schistosoma mansoni. III. The nerve tissue and sensory structures. S Afr J Med Sci 34:93–104
Webb RA (1976a) Ultrastructure of synapses of the metacestode of Hymenolepis microstoma. Experientia 32:99–101
Webb RA (1976b) Putative neurosecretory cells of the cestode Hymenolepis microstoma. J Parasitol 62:756–760
Webb RA (1977) Evidence for neurosecretory cells in the cestode Hymenolepis microstoma. Can J Zool 55:1726–1733
Webb RA, Davey KG (1975) The gross anatomy and histology of the nervous system of the metacestode of Hymenolepis microstoma. Can J Zool 53:661–667
Webb RA, Davey KG (1976) The fine structure of the nervous tissue of the metacestode of Hymenolepis microstoma. Can J Zool 54:1206–1222
Whitfield PJ (1979) The biology of parasitism. Edward Arnold, London
Wilson RA (1970) Fine structure of the nervous system and specialized nerve endings in the miracidium of Fasciola hepatica. Parasitology 60:399–410
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Shaw, M.K. The ultrastructure of synapses in the brain of Gastrocotyle trachuri (Monogenea, Platyhelminthes). Cell Tissue Res. 220, 181–189 (1981). https://doi.org/10.1007/BF00209976
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DOI: https://doi.org/10.1007/BF00209976