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The ultrastructure of the fore-gut of the redia of Parorchis acanthus Nicoll (Digenea: Philophthalmidae) from the digestive gland of Nucella lapillus L

Published online by Cambridge University Press:  06 April 2009

F. Gwendolen Rees
F. Gwendolen Rees
Affiliation:
Department of Zoology, University College of Wales, Aberystwyth, Dyfed SY23 3D A
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Summary

The fore-gut of the redia of Parorchis acanthus is ingestive in function. It consists of a buccal cavity, suctorial pharynx and an oesophagus divided into anterior and posterior regions. The syncytial lining is continuous with that covering the body surface, except for the posterior region of the oesophagus which is lined by a separate syncytium. This latter has different cytoplasmic inclusions and the unusual feature of a single ventral nucleus in the outer cytoplasmic epidermis. Intrinsic and extrinsic muscles are responsible, respectively, for the fairly rapid passage of food through the fore-gut and for support. Secretion bodies in the epidermis are probably discharged into the lumen and pass with food into the intestine where they may be involved in extracellular digestion. Young rediae feed mainly by mouth while older, immotile rediae absorb nutrients mainly through the body surface.

Type
Research Article
Information
Parasitology , Volume 87 , Issue 1 , August 1983 , pp. 151 - 158
Copyright
Copyright © Cambridge University Press 1983

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References

REFERENCES

Bogitsh, B. J. (1972). Cytochemical and biochemical observations on the digestive tracts of digenetic trematodes IX. Megalodiscus temperatus. Experimental Parasitology 32, 244–60.CrossRefGoogle ScholarPubMed
Bruce, J. I., Pezzlo, F., Yajima, Y. & McCarty, J. E. (1971). An electron microscopic study of Schistosoma mansoni migration through mouse tissue. Ultrastructure of the gut during the hepato-portal phase of migration. Experimental Parasitology 30, 165–73.CrossRefGoogle Scholar
Dike, S. C. (1971). Ultrastructure of the oesophageal region in Schistosoma mansoni. American Journal of Tropical Medicine and Hygiene 20, 552–68.CrossRefGoogle ScholarPubMed
Køie, M. (1971). On the histochemistry and ultrastructure of the redia of Neophasis lageniformis (Lebour, 1910) (Trematoda: Acanthocolpidae). Ophelia 9, 113–43.CrossRefGoogle Scholar
Køie, M. (1973). The ultrastructure of the caecal epithelium of the intraredial cercaria of Neophasis lageniformis (Lebour, 1910) (Trematoda: Acanthocolpidae). Zeitschrift für Zellforschung und mikroskopische Anatomic 139, 405–16.CrossRefGoogle ScholarPubMed
McDaniel, J. S. & Dixon, K. E. (1967). Utilization of exogenous glucose by the redia of Parorchis acanthus (Digenea: Philophthalmidae) and Cryptocotyle lingua (Digenea: Hetero-phyidae). Biological Bulletin, Marine Biological Laboratory, Woods Hole, Mass. 133, 591–9.CrossRefGoogle ScholarPubMed
Rees, G. (1966). Light and electron microscope studies of the redia of Parorchis acanthus Nicoll. Parasitology 56, 589–602.CrossRefGoogle Scholar
Rees, F. G. (1980). Surface ultrastructure of the redia of Parorchis acanthus Nicoll (Digenea: Philophthalmidae). Zeitschrift für Parasitenkunde 63, 33–46.CrossRefGoogle Scholar
Rees, F. G. (1981). The ultrastructure of the epidermis of the redia of Parorchis acanthus Nicoll (Digenea: Philophthalmidae). Zeitschrift für Parasitenkunde 65, 19–30.CrossRefGoogle Scholar
Reynolds, E. S. (1963). The use of lead citrate at high pH as an electron opaque stain in electron microscopy. Journal of Cell Biology 17, 207–12.Google ScholarPubMed
Rohde, K. (1974). Light and electron-microscope studies of the pharynx and the anterior and posterior glands of Polystomoides (Monogenea: Polystomatidae). Zoologische Jahrbücher (Anatomie) 92, 1–17.Google Scholar
Rohde, K. (1975). Fine structure of the Monogenea, especially Polystomoides Ward. Advances in Parasitology 13, 1–23.CrossRefGoogle Scholar
Senft, A. W., Philpott, D. E. & Pelofsky, A. H. (1961). Electron microscope observations of the integument, flame cells and gut of Schistosoma mansoni. Journal of Parasitology 47, 21729.CrossRefGoogle ScholarPubMed
Shannon, W. A. & Booitsh, C. J. (1969). Cytochemical and biochemical observations on the digestive tracts of digenetic trematodes V. Ultrastructure of Schistosoma douthitti gut. Experimental Parasitology 26, 344–53.CrossRefGoogle Scholar
Spence, I. M. & Silk, M. H. (1970). Ultrastructural studies on the blood fluke Schistosoma mansoni IV. The digestive system. South African Journal of Medical Sciences 35, 93–112.Google ScholarPubMed