Abstract
The cephalic sensory organ (CSO) in planktonic veliger larvae of Littorina littorea is situated dorsally between the velar lobes at the level of the shell aperture. It consists of ciliated primary sensory cells, adjacent accessory cells and supporting epithelial cells. Cell bodies of the ciliated cells originate in the cerebral commissure and their dendrites pass to the epidermis. The flask-shaped sensory cells are characterized by a deep invaginated lumen with modified cilia arising from the cell surface in the lumen. These cilia are presumed to be non-motile because they lack striated rootlets and show a modified microtubular pattern (6 + 2, 7 + 2 and 8 + 2). The adjacent accessory cells never possess an invaginated lumen; occasionally cilia and branched microvilli arise from the apical surface. These cells may be sensory, but there is no obvious direct connection with the nervous system. The supporting epithelial cells are part of the epidermis and flank the apical necks of the sensory and accessory cells. Morphological evidence suggests that the CSO may function in chemoreception related to substrate selection at settlement, feeding or other behaviour.
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References
Barber, V. G, 1974. Cilia and sense organs. In M. A. Sleight (ed.), Cilia and flagella. Academic Press, London: 403–430.
Barber, V. C. & D. E. Wright, 1969. The fine structure of the sense organs of the cephalopod mollusc Nautilus. Z. Zellforsch. 102: 293–312.
Bonar, D. B., 1978a. Ultrastructure of the cephalic sensory organ in larvae of the gastropod Phestilla sibogae, (Aeolidacea, Nudi-branchia). Tissue Cell 10: 153–165.
Bonar, D. B., 1978b. Morphogenesis at metamorphosis in opisthobranch molluscs. In F. S. Chia & E. Rice (eds), Settlement and metamorphosis of marine invertebrate larvae, Elsevier, New York: 177–196.
Chia, F. S. & R. Koss, 1982. Fine structure of the larval rhinophores of the nudibranch, Rostanga pulchra, with emphasis on the sensory receptor cells. Cell Tiss. Res. 225: 235–248.
Chia, F. S. & R. Koss, 1984. Fine structure of the cephalic sensoryorgan in the larva of the nudibranch Rostanga pulchra (Mollusca, Opisthobranchia, Nudibranchia). Zoomorph. 104: 131–139.
Crisp, M., 1973. Fine structure of some prosobranch osphradia. Mar. Biol. 22: 231–240.
Conklin, E. J., 1897. The embryology of Crepidula. J. Morph. 13: 1–227.
Davis, W. J. & E. M. Matera, 1981. Chemoreception in gastropod molluscs: Electron microscopy of putative receptor cells. J. Neurobiol. 13: 79–84.
Emery, D. G., 1975. The histology and fine structure of the olfactory organ of the squid Lolliguncula brevis Blainville. Tiss. Cell 7: 357–367.
Emery, D. G., 1976. Observations on the olfactory organ of adult and juvenile Octopus joubinii. Tiss. Cell 8: 33–46.
Haszprunar, G., 1985. The fine morphology of the osphradial sense organs of the mollusca. 1. Gastropoda, Prosobranchia. Phil. Trans. r. Soc, Lond. B 307: 457–496.
Horridge, G. A., 1965. Non-motile sensory cilia and neuromuscular junctions in Ctenophores. Proc. r. Soc., Lond. B 162: 333–350.
Laverack, M. S., 1988. The diversity of chemoreceptors. In J. Atema et al. (eds), Sensory biology of aquatic animals, Springer Verlag 11: 287–312.
Nagl, W., 1981. Elektronenmikroskopische Laborpraxis. Springer Verlag, Berlin.
Patten, W., 1886. The embryology of Patella. Arb. zool. Inst. Wien, Triest 6: 149–174.
Pelseneer, P., 1911. Recherches sur l’embryologie des gastéropodes. Mém. acad. r. Belg. Sci. Sér. 2: 1–163.
Phillips, D. W., 1979. Ultrastructure of sensory cells on the mantle tentacles of the gastropod Notoacmea scutum. Tiss. Cell 11: 623–632.
Reynolds, F. S., 1963. The use of lead citrate at high pH as an electron opaque stain in electron microscopy. J. Cell Biol. 17: 208–212.
Robinson, D. G., U. Ehlers, T. Herken, B. Herrmann, F. Mayer & F.-W. Schürmann, 1985. Präparationsmethodik in der Elektronenmikroskopie. Springer Verlag, Berlin, Heidelberg, New York.
Storch, V, 1972. Elektronenmikroskopische und histochemische Untersuchungen über Rezeptoren von Gastropoden (Prosobranchia, Opisthobranchia). Z. wiss. Zool. 184: 1–26.
Welsch, U. & V. Storch, 1969. Über das Osphradium der prosobranchen Schnecken Buccinum undatum L. und Neptunea antiqua (L.). Z. Zellforsch. 95: 317–330.
Werner, B., 1955. Über die Anatomie, die Entwicklung und Biologie des Veligers und der Veliconcha von Crepidula fornicata L. (Gastropoda Prosobranchia). Helgoländer wiss. Meeresunters 5: 196–217.
Wildenburg, G. & P. Fioroni, 1989. Ultrastructure of the olfactory organ during embryonic development and at the hatching stage of Loligo vulgaris Lam. (Cephalopoda). J. Ceph. Biol. 1: 56–70.
Woodhams, P. L. & J. B. Messenger, 1974. A note on the ultrastructure of the Octopus olfactory organ. Cell Tiss. Res. 152: 253–258.
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Uthe, D. (1995). Fine structure of the cephalic sensory organ in veliger larvae of Littorina littorea, (L.) (Mesogastropoda, Littorinidae). In: Mill, P.J., McQuaid, C.D. (eds) Advances in Littorinid Biology. Developments in Hydrobiology, vol 111. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0435-7_5
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DOI: https://doi.org/10.1007/978-94-011-0435-7_5
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