Hostname: page-component-84b7d79bbc-g5fl4 Total loading time: 0 Render date: 2024-07-25T23:47:22.972Z Has data issue: false hasContentIssue false

The structure of the egg-shell of Aspiculuris tetraptera Schulz (Nematoda: Oxyuroidea)

Published online by Cambridge University Press:  06 April 2009

D. A. Wharton
Affiliation:
Department of Zoology, University of Bristol, Woodland Road, Bristol

Extract

The egg of Aspiculuris tetraptera is an ellipsoid measuring 93 × 40 µm. The shell consists of 5 layers: the external uterine layer, internal uterine layer, vitelline layer, chitinous layer and the lipid layer. This nomenclature is based upon the formation and histochemistry of the shell layers. The internal uterine layer contains a system of interconnecting spaces, partly filled by uterine secretion, which open to the exterior of the egg via breaks in the external uterine layer. The surface of the egg is covered by a system of interconnecting grooves. Freeze-etching reveals that the internal uterine layer is open to the exterior via pores, which open into the grooves. Rod-shaped particles are also revealed in the external uterine layer. The operculum of the egg consists of a modification of the uterine and chitinous layers of the shell.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1979

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

Anya, A. O. (1964 a). The distribution of lipid and glycogen in some female Oxyurids. Parasitology 54, 555–66.CrossRefGoogle Scholar
Anya, A. O. (1964 b). Studies on the structure of the female reproductive system and eggshell formation in Aspiculuris tetraptera Schulz (Nematoda: Oxyuroidea). Parasitology 54, 699719.CrossRefGoogle ScholarPubMed
Anya, A. O. (1976). Physiological aspects of reproduction in nematodes. Advances in Parasitology 14, 267351.CrossRefGoogle ScholarPubMed
Bird, A. F. (1971). The Structure of Nematodes. New York and London: Academic Press.Google Scholar
Bird, A. F. & McClure, M. A. (1976). The tylenchid (Nematoda) egg shell: structure, composition and permeability. Parasitology 72, 1928.CrossRefGoogle Scholar
Branton, D. (1973). The fracture process of freeze-etching. In Freeze Etching: Techniques and Applications (ed. Benedetti, E. L. and Favard, P.). Paris: Societé Françoise de Microscopie Électronique.Google Scholar
Chitwood, B. G. (1932). A synopsis of the nematodes parasitic in insects of the family Blattidae. Zeitschrift für Parasitenkunde 5, 1450.CrossRefGoogle Scholar
Christenson, R. O. (1950). Nemic ova. In Introduction to Nematology (ed. Chitwood, B. G. and Chitwood, M. B.). Baltimore: Monumental Printing Company.Google Scholar
Fairbain, D. (1957). The biochemistry of Ascaris. Experimental Parasitology 6, 491554.CrossRefGoogle Scholar
Heslop-Harrison, J. (1975). The physiology of the pollen grain surface. Proceedings of the Royal Society of London B 190, 275–99.Google ScholarPubMed
Hinton, H. E. (1969). Respiratory systems of insect egg-shells. Annual Review of Entomology 14, 343–68.CrossRefGoogle ScholarPubMed
Hinton, H. E. (1970). Insect egg-shells. Scientific American 223, 8491.CrossRefGoogle Scholar
Hulínská, D. & Hulínský, V. (1973). Histological and histochemical studies on the egg-shell of Enterobius vermicularis. Folia Parasitologica 20, 319–28Google ScholarPubMed
Inatomi, S. (1957). A study on the structure of the egg-shell of Enterobius vermicularis (Linnaeus, 1758) Leach 1853, with the electron microscope. Acta Medicinae Okayama 11, 1822.Google Scholar
Monné, L. & Hönig, G. (1954). On the properties of the egg envelopes of various parasitic nematodes. Arkiv für Zoologi 7, 261–72.Google Scholar
Neville, A. C. (1975). Biology of the Arthropod Cuticle. Berlin: Springer-Verlag.CrossRefGoogle Scholar
Pearse, A. G. E. (1968). Histochemistry: Theoretical and Applied. London: Churchill.Google Scholar
Philpot, F. (1924). Notes on the eggs and early development of some species of Oxyuridae. Journal of Helminthology 2, 239–52.CrossRefGoogle Scholar
Rogers, W. P. (1962). The Nature of Parasitism. New York and London: Academic Press.Google Scholar
Staehelin, L. A. (1973). Analysis and critical evaluation of the information contained in freeze-etch micrographs. In Freeze Etching: Techniques and Applications (ed. Benedetti, E. L. and Favard, P.). Paris: Societé Françoise de Microscopie Électronique.Google Scholar
Wharton, D. A. (1975). Structure and function in an Oxyurid egg. Parasitology 71, xxii.Google Scholar
Wharton, D. A. (1977). A study on the structure and function of the eggs of some parasitic nematodes. Ph.D. thesis, Bristol University.Google Scholar
Wharton, D. A. (1979). Oogenesis and egg-shell formation in Aspiculuris tetraptera Schulz (Nematoda: Oxyuroidea). Parasitology 78, 131–43.CrossRefGoogle ScholarPubMed
Wourms, J. P. (1976). Annual fish oogenesis. 1. Differentiation of the mature oocyte and formation of the primary envelope. Developmental Biology 50, 338–54.CrossRefGoogle Scholar
Wourms, J. P. & Sheldon, H. (1976). Annual fish oogenesis. II. Formation of the secondary envelopes. Developmental Biology 50, 355–66.CrossRefGoogle Scholar