Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-24T11:32:53.507Z Has data issue: false hasContentIssue false
  • English
  • Français

Compound sensilla in monogenean skin parasites

Published online by Cambridge University Press:  06 April 2009

Kathleen M. Lyons
Kathleen M. Lyons
Affiliation:
*The Molteno Institute Cambridge
Get access Rights & Permissions [Opens in a new window]

Extract

The fine structure of two kinds of compound presumed sense organs from the heads of three skin parasitic monogeneans Gyrodactylus sp. Entobdella soleae (larva only) and Acanthocotyle elegans is described. One kind of compound receptor consists of a number of associated sensilla, each ending in a single cilium (the spike sensilla of Gyrodactylus and the cone sensilla of E. soleae oncomiracidium).

The other kind of compound organ is made up of one or a few neurones only, each of which bears many cilia (pit organs of E. soleae oncomiracidium and feeding organ sensilla of Acanthocotyle elegans). The spike sensilla of Gyrodactylus have also been studied using a Cambridge Instrument Co. Stereoscan electron microscope and by phase-contrast microscopy. The ciliary endings of all these sense organs are highly modified and have lost the 9 + 2 structure, being packed with many fibres. The fibre arrangement in the cilia of the cone sensillae of E. soleae oncomiracidium and the feeding organ sensilla of A. elegans has been compared with that in the ciliary endings of other invertebrate mechano- and chemoreceptors. The possibility that the spike sensilla of Gyrodactylus may be chemoreceptors has been discussed but it is considered premature to attempt to assign functions to the other sense organs studied. Electron dense membrane-bound inclusions occurring specifically in the nerves supplying the spike sensilla of Gyrodactylus may be neurosecretory.

Type
Research Article
Information
Parasitology , Volume 59 , Issue 3 , August 1969 , pp. 625 - 636
Copyright
Copyright © Cambridge University Press 1969

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Afzelius, B. A. (1963). Cilia and flagella that do not conform to the 9 + 2 pattern 1. Aberrant members within normal populations. J. Ultrastruct. Res. 9, 381–92.Google Scholar
Bullock, T. H. & Horridge, G. A. (1965). Structure and Function in the Nervous Systems of Invertebrates, vol. 1. San Francisco and London: W. H. Freeman and Company.Google Scholar
Davey, K. G. & Brekenridge, W. R. (1967). Neurosecretory cells in a cestode, Hymenolepis diminuta. Science, N.Y. 158, 931–2.CrossRefGoogle Scholar
De Lorenzo, A. J. (1958). Electron microscopic observations on the taste buds of the rabbit. J. biophys. biochem. Cytol. 4, 143–50.Google Scholar
Farbman, A. I. (1965). Fine structure of the taste bud. J. Ultrastruct. Res. 12, 328–50.Google Scholar
Finlayson, L. H. & Osborne, M. P. (1968). Peripheral neurosecretory cells in the stick insect (Carausius morosus) and the blowfly larva (Phormia terrae-novae). J. Insect Physiol. 14, 1793–1801.Google Scholar
Gibbons, I. R. & Grimstone, A. V. (1960). On flagellar structure in certain flagellates. J. biophys. biochem. Cytol. 7, 697–715.CrossRefGoogle ScholarPubMed
Gray, E. G. (1960). The fine structure of the insect ear. Phil. Trans. R. Soc. B 243, 75–94.Google Scholar
Horridge, G. A. (1965). Non-motile sensory cilia and neuromuscular junctions in a ctenophore independent effector organ. Proc. R. Soc. B 162, 333–50.Google Scholar
Horridge, G. A. & Boulton, P. S. (1967). Prey detection by Chaetognatha via a vibration sense. Proc. R. Soc. B 168, 413–9.Google Scholar
Kearn, G. C. (1963). Feeding in some monogenean skin parasites: Entobdella soleae on Solea solea and Acanthocotyle sp. on Raia clavata. J. mar. biol. Ass. U.K. 43, 749–66.Google Scholar
Kearn, G. C. (1967 a). The life-cycles and larval development of some acanthocotylids (Monogenea) from Plymouth rays. Parasitology 57, 157–67.Google Scholar
Kearn, G. C. (1967 b). Experiments on host-finding and host-specificity in the monogenean skin parasite Entobdella soleae. Parasitology, 57, 585–605.CrossRefGoogle ScholarPubMed
Lentz, T. L. & Barrnett, R. J. (1965). Fine structure of the nervous system of Hydra. Am. Zool. 5, 341–56.Google ScholarPubMed
Lyons, K. M. (1968). A comparison of the adultepidermis of some monogeneans: the development of the outer layer in Entobdella soleae. (Abstract). Parasitology 58, 14p.Google Scholar
Lyons, K. M. (1969). Sense organs of monogenean skin parasites ending in a typical cilium. Parasitology. 59, 611–23.CrossRefGoogle Scholar
Malmberg, G. (1956). Om förekomsten av Gyrodactylus på Svenska fiskar. Skr. sverig. Fiskfören pp. 19–76.Google Scholar
Okano, M., Weber, A. F. & Frommes, S. P. (1967). Electron microscope studies on the distal border of the canine olfactory epithelium. J. Ultrastruct. Res. 17, 487–502.Google Scholar
Poinar, G. R. Jr & Leutenegger, R. (1968). Anatomy of the infective and normal third stage juveniles of Neoaplectana carpocapsae Weiser (Steiner nematidae:Nematoda). J. Parasit. 54, 340–50.Google Scholar
Reese, T. S. (1965). Olfactory cilia in the frog. J. Cell Biol. 25, 209–30.Google Scholar
Rohde, K. (1968). Lichtmikroskopische Untersuchungen an den Sinnesrezeptoren der Trematoden. Z. Parasitkde 30, 252–77.Google Scholar
Ross, Mignon, M. R. (1967). Modified cilia in sensory organs of juvenile stages of a parasite nematode. Science, N.Y. 156, 1494–5.CrossRefGoogle Scholar
Satir, P. (1962). On the evolutionary stability of the 9 + 2 pattern. J. Cell Biol. 12, 181–4.Google Scholar
Slifer, E. H. & Sekhon, S. S. (1964). The dendrites of the thin-walled olfactory pegs of the grasshopper Orthoptera, Acrididae. J. Morph. 114, 393–409.CrossRefGoogle ScholarPubMed
Slifer, E. H., Sekhon, S. S. & Lees, A. D. (1964). The sense organs on the antennal flagellum of aphids (Homoptera), with special reference to the plate organs. Q. Jl microsc. Sci. 105, 21–9.Google Scholar
Thurm, U. (1964). Mechanoreceptors in the cuticle of the honey bee: fine structure and stimulus mechanism. Science, N.Y. 145, 1063–5.Google Scholar
Warr, J. R., McVittie, A., Randall, J. & Hopkins, J. M. (1966). Genetic control of flagellar structure in Chlamydomonas reinhardii. Genet. Res. 7, 335–51.Google Scholar
Whitear, M. (1962). The fine structure of crustacean proprioceptors I. The chordotonal organs in the legs of the shore crab, Carcinus maenas. Phil. Trans. R. Soc. B 245, 291–324.Google Scholar