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Observations on the surface morphology of the ovarian balls of Moniliformis (Acanthocephala)

Published online by Cambridge University Press:  06 April 2009

V. R. Parshad ,
D. W. T. Crompton  and
Jean Martin
V. R. Parshad
Affiliation:
The Molteno institute, University of Cambridge
D. W. T. Crompton
Affiliation:
The Molteno institute, University of Cambridge
Jean Martin
Affiliation:
The Molteno institute, University of Cambridge
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Summary

The surface morphology of fixed ovarian balls from female Moniliformis dubius, aged 12, 18, 26, 28, 42, 77, 105 and 118 days, has been examined by means of scanning electron microscopy. The appearance of the surface has been found to be variable between ovarian balls from worms of the same and different ages. Some parts of the surface are seen to possess micro-projections, cavities and ridges while other parts have the appearance of an irregular meshwork of fibres. Various protruding features have been observed to extend from the surfaces of the ovarian balls taken from the inseminated female worms. In most cases, the surfaces of the protruding features differ in appearance from the surrounding surfaces of the ovarian balls. Some of these features have been assumed to represent growing zygotes and developing eggs covered by the supporting syncytium of the ovarian ball. Single or several thread-like structures have been observed in association with the surfaces of ovarian balls taken from the inseminated female worms. At present, the thread-like structures are believed to be portions of spermatozoa. By means of light microscopy, preliminary observations have been made on what is considered to be the division process of ovarian balls taken from uninseminated and inseminated worms varying in age from 7 to 98 days.

Type
Research Article
Information
Parasitology , Volume 81 , Issue 2 , October 1980 , pp. 423 - 431
Copyright
Copyright © Cambridge University Press 1980

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References

REFERENCES

Anantaraman, S. & Subramoniam, T. (1975). Oogenesis in Acanthosentis oligospinus n. sp., an acanthocephalan parasite of the fish, Marcrones gulio. 1. The morphology of the oocyte and distribution of the nucleic acids. Proceedings of the Indian Academy of Sciences 82 B, 139–45.CrossRefGoogle Scholar
Asaolu, S. O. (1976). Ovarian ball development in Moniliformis (Acanthocephala). Parasitology 73, xxvii.Google Scholar
Atkinson, K. H. & Byram, J. E. (1976). The structure of the ovarian ball and oogenesis in Moniliformis dubius (Acanthocephala). Journal of Morphology 148, 391–426.CrossRefGoogle Scholar
Bullock, W. L. (1969). Morphological features as tools and as pitfalls in acanthocephalan systematics. In Problems in Systematics of Parasites, (ed. Schmidt, G. D.), pp. 9–45. Baltimore: University Park Press.Google Scholar
Crompton, D. W. T., Arnold, S. & Walters, D. E. (1976). The number and size of ovarian balls of Moniliformis (Acanthocephala) from laboratory rats. Parasitology 73, 65–72.CrossRefGoogle ScholarPubMed
Crompton, D. W. T. & Walters, D. E. (1972). An analysis of the course of infection of Moniliformis dubius (Acanthocephala) in rats. Parasitology 64, 517–23.CrossRefGoogle ScholarPubMed
Crompton, D. W. T. & Whitfield, P. J. (1974). Observations on the functional organization of the ovarian balls of Moniliformis and Polymorphus (Acanthocephala). Parasitology 69, 429–43.CrossRefGoogle ScholarPubMed
Marchand, B. & Mattei, X. (1976 a). Presence des flagelles spermatiques dans les spheres ovariennes des Eoacanthocephales. Journal of Ultrastructure Research 56, 331–8.CrossRefGoogle Scholar
Marchand, B. & Mattei, X. (1976 b). La spermatogenese des Acanthocephales. II. Variation du nombre de fibres centrales dans le flagelle spermatique d'Acanthosentis tilapiae Baylis, 1947 (Eoacanthocephala, Quadrigyridae). Journal of Ultrastructure Research 55, 391–9.CrossRefGoogle ScholarPubMed
Meyer, A. (1933). Acanthocephala, Bronns Klassen und Ordnungen des Tierreichs, Bd4, Abt. 2, Buch 2, Leipzig: Akademische Verlagsgesellschaft m.b.H.Google Scholar
Nesheim, M. C., Crompton, D. W. T., Arnold, S. & Barnard, D. (1977). Dietary relations between Moniliformis (Acanthocephala) and laboratory rats. Proceedings of the Royal Society of London, B 197, 363–83.Google ScholarPubMed
Nicholas, W. L. & Hynes, H. B. N. (1963). The embryology of Polymorphus minutus (Acanthocephala). Proceedings of the Zoological Society of London 141, 791–801.CrossRefGoogle Scholar
Parshad, V. R. & Guraya, S. S. (1977). Morphological and histochemical observations on the ovarian balls of Centrorhynchus corvi (Acanthocephala). Parasitology 74, 243–53.CrossRefGoogle ScholarPubMed
Parshad, V. R. & Guraya, S. S. (1978). Morphological and histochemical observations on oocyte atresia in Centrorhynchus corvi (Acanthocephala). Parasitology 77, 133–8.CrossRefGoogle Scholar
Stranack, F. R. (1972). The fine structure of the acanthor shell of Pomphorhynchus laevis (Acanthocephala). Parasitology 64, 187–90.CrossRefGoogle ScholarPubMed
Van Cleave, H. J. (1953). Acanthocephala of North American Mammals. Illinois Biological Monographs 23, 1–179.Google Scholar
Whitfield, P. J. (1971). Spermiogenesis and spermatozoan ultrastructure in Polymorphus minutus (Acanthocephala). Parasitology 62, 415–30.CrossRefGoogle Scholar