Summary
The fine structure of synapses, their distribution and arrangement in the ventral nerve cord of Peripatoides leuckarti (phylum Onychophora) is described. The asymmetric synaptic junctions show a well developed synaptic cleft (300Å) and pre- and subsynaptic electron dense apposition. They frequently show an array of presynaptic projections and a subsynaptic cisterna of endoplasmic reticulum. The onychophoran synapses differ from those of annelids and insects.
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Best, J.B., Noel, J.: Complex synaptic configurations in planarian brain. Science 164, 1070–1071 (1969)
Bloom, F.E.: Correlating structure and function of synaptic ultrastructure. In: The neurosciences (F.O. Schmitt, ed.), New York: The Rockefeller University Press (1970)
Bloom, F.E., Aghajanian, G.K.: Fine structural and cytochemical analysis of the staining of synaptic junctions with phosphotungstic acid. J. Ultrastruct. Res. 22, 361–375 (1968)
Boschek, C.B.: On the fine structure of the peripheral retina and the lamina of the fly, Musca domestica. Z. Zellforsch. 110, 366′-349 (1971)
Burckhardt, W., Braitenberg, V.: Some peculiar synaptic complexes in the first visual ganglion of the fly, Musca domestica. Cell Tiss. Res. 173, 287–308 (1976)
Coggeshall, R.E., Fawcett, D.W.: The fine structure of the central nervous system of the leech Hirudo medicinalis. J. Neurophysiol. 27, 229–289 (1964)
Dhainaut-Courtois, N., Warembourg, M.: Etude ultrastructurale des neurones de la chaîne nerveuse de Nereis pelagica L. (Annélide Polychète). Z. Zellforsch. 97, 260–273 (1969)
Eakin, R.M., Brandenburger, J.L.: Fine structure of antennal receptors in Peripatus (Onychophora). Amer. Zoologist 6, 614 (1966)
Eakin, R.M., Westfall, J.A.: Fine structure of the eye of Peripatus(Onychophora). Z. Zellforsch. 68, 278–300 (1965)
Feodorov, B.: Zur Anatomie des Nervensystems von Peripatus. I. Das Neurosomit von Peripatus tholloni Bouv. Zool. Jb. (Anat.) 48, 273–310 (1926)
Feodorov, B.: Zur Anatomie des Nervensystems von Peripatus. II. Das Nervensystem des vorderen Körperendes und seine Metamerie. Zool. Jb. (Anat.) 50, 279–332 (1929)
Gray, E.G.: Axosomatic and axodendritic synapses of cerebral cortex: an electron microscope study. J. Anat. (Lond.) 93, 420–433 (1959)
Gray, E.G., Guillery, R.W.: Synaptic morphology in the normal and degenerating nervous system. Int. Rev. Cytol. 19, 11–182 (1966)
Günther, J., Schürmann, F.W.: Zur Feinstruktur des dorsalen Riesenfasersystems im Bauchmark des Regenwurms. II. Synaptische Beziehungen der proximalen Riesenfaserkollateralen. Z. Zellforsch. 139, 369–396 (1973)
Hanström, B.: Vergleichende Anatomie des Nervensystems der wirbellosen Tiere. Berlin: Springer 1928
Hanström, B.: Bemerkungen über das Gehirn und die Sinnesorgane der Onychophoren. Lunds Univ. Arskr. N.F. 31, 1–37 (1935)
Holmgren, N.: Zur vergleichenden Anatomie des Gehirns von Polychaeten, Onychophoren, Xiphosuren. Kungl. Svenska Vet. Akad. Handl. 56 (1916)
Horridge, G.A.: Onychophora. In: Bullock, T.H., Horridge, G.A., Structure and function in the nervous system of invertebrates, Vol 1, pp. 791–798. San Francisco and London: Freeman 1965
Jones, D.G.: The fine structure of the synaptic membrane adhesions on Octopus synaptosomes. Z. Zellforsch. 88, 457–469 (1968)
Krasne, F.B., Stirling, C.A.: Synapses of crayfish abdominal ganglia with special attention to afferent and efferent connections of the lateral giant fibres. Z. Zellforsch. 127, 526–544 (1972)
Lamparter, H.E., Steiger, U., Sandri, C., Akert, K.: Zum Feinbau der Synapsen im Zentralnervensystem der Insekten. Z. Zellforsch. 99, 435–442 (1969)
Muller, K.J., McMahan, U.J.: The shapes of sensory and motor neurons and the distribution of their synapses in ganglia of the leech: a study using intracellular injection of horseradish peroxidase. Proc. roy. Soc. B 194, 481–499 (1976)
Myhrberg, H.E.: Ultrastructural localization of monoamines in the central nervous system of Lumbricus terrestris L. with remarks on neurosecretory vesicles. Z. Zellforsch. 126, 348–362 (1972)
Pfenninger, K.H.: Synaptic morphology and cytochemistry. Progress in Histochemistry and Cytochemistry, Vol. 5, No 1. Stuttgart: Fischer 1973
Sänger, N.: Peripatus capensis gr. et Peripatus leucartii n.sp.In: Trav. 2. Congr. Nat. Russ., Moscou 1869 (1870)
Schürmann, F. W.: Synaptic contacts of association fibres in the brain of the bee. Brain Res. 26, 169–176 (1971)
Schürmann, F.W., Günther, J.: Zur Feinstruktur des dorsalen Riesenfasersystems im Bauchmark des Regenwurms. I. Die Somata der Riesenfasern. Z. Zellforsch. 139, 351–368 (1973)
Schürmann, F.W., Sandeman, D.C.: Giant fibres in the ventral nerve cord of Peripatoides leuckarti (Onychophora). Naturwissenschaften 63, 580–581 (1976)
Smith, D.S.: The organization of the insect neuropil. In: Invertebrate nervous systems (C.A.G. Wiersma, ed.), pp. 79–85. Chicago: Univ. of Chicago Press 1967
Storch, V., Ruhberg, H.: Fine structure of sensilla of Peripatopsis moseleyi(Onychophora). Cell Tiss. Res. 177, 539–553 (1977)
Strausfeld, N.J.: Atlas of an insect brain. Berlin-Heidelberg-New York: Springer 1976
Trujillo-Cenóz, O.: Some aspects of the structural organization of the intermediate retina of dipterans. J. Ultrastruct. Res. 13, 1–33 (1965)
Trujillo-Cenóz, O.: Some aspects of the structural organization of the medulla in muscoid flies. J. Ultrastruct. Res. 27, 535–553 (1969)
Westfall, J.A., Yamataka, S., Enos, P.D.: Ultrastructural evidence of polarized synapses in the nerve net of Hydra. J. Cell Biol. 51, 318–323 (1971)
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Supported by the Deutsche Forschungsgemeinschaft, grant Schu 374/1
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Schürmann, F.W. A note on the structure of synapses in the ventral nerve cord of the onychophoran peripatoides leuckarti . Cell Tissue Res. 186, 527–534 (1978). https://doi.org/10.1007/BF00224940
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DOI: https://doi.org/10.1007/BF00224940