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The function of the paraoesophageal glands in an echinostome (digenean) cercaria (? Cercaria spinifera La Valette, 1855)

Published online by Cambridge University Press:  05 June 2009

G. Cleveland  and
G. C. Kearn
G. Cleveland
Affiliation:
School of Biological Sciences, University of East Anglia, Norwich, NR4 7TJ, UK
G. C. Kearn
Affiliation:
School of Biological Sciences, University of East Anglia, Norwich, NR4 7TJ, UK
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Abstract

An echinostome cercaria (? Cercaria spinifera La Valette, 1855) with 37 collar spines and paraoesophageal glands has been recorded for the first time in Britain from the gastropod Planorbarius corneus. The cercariae penetrate into and encyst in planarians. Observations made on cercariae during penetration indicate that the paraoesophageal glands are used to enter the body of the planarian and that the so-called penetration glands have some other function. Gastropod molluscs may also serve as second intermediate hosts, but there is evidence to indicate that anatomically similar cercariae from different host individuals vary in their second intermediate host preferences.

Keywords

DigeneaechinostomesCercaria spiniferaparaoesophageal glandsplanarianspenetrationPlanorbarius corneus
Type
Research Article
Information
Journal of Helminthology , Volume 63 , Issue 3 , September 1989 , pp. 231 - 238
Copyright
Copyright © Cambridge University Press 1989

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References

REFERENCES

De la Valette St. George, A. (1855) Symbolae ad trematodum evolutionis historiam. Dissertation. Berlin.Google Scholar
Frankenberg, G. (1935) Trematodencysten in Turbellarien. Zoologischer Anzeiger, 112, 237–242.Google Scholar
Kanev, I. (1985) On the morphology, biology, ecology and taxonomy of species of the “revolutum” group (Trematoda: Echinostomatidae: Echinostoma). Special Publication of the Bulgarian Academy of Sciences, Sofia. (In Bulgarian; English summary).Google Scholar
Kanev, I. & Odening, K. (1983) Further studies on Cercaria spinifera La Valette, 1855 in Central Europe. Khelmintologiya Sofia, 15, 24–34.Google Scholar
Lie, K. J. (1966) Studies on Echinostomatidae (Trematoda) in Malaya XIV. Body gland cells in cercariae of Echinostoma audyi Lie and Umathevy, and E. lindoense Sandground and Bonne. Journal of Parasitology, 52, 1049–1052.CrossRefGoogle Scholar
Lynch, J. E. (1933) The miracidium of Heronimus chelydrae MacCallum. Quarterly Journal of Microscopical Science, 76, 13–33.Google Scholar
Našincová, V. (1986) Contribution to the distribution and the life history of Echinostoma revolutum (Trematoda) in Central Europe. Věstník Československé Společnosti Zoologické, 50, 70–80.Google Scholar
Odening, K. (1964) What is Cercaria spinifera La Valette? Some remarks on the species identity and biology of some echinostome cercariae. In: Parasitic Worms and Aquatic Conditions, (editors, Ergens, R. & Ryšavý, B). Czechoslovak Academy of Sciences, pp 91–97.Google Scholar
Vojtková, L. (1969) Die Bedeutung der Planarian in Entwicklungszyklus der Trematoden der Familie Echinostomatidae Dietz, 1909. Folia Facultatis Scientiarum Naturalium Universitatis Purkynianae Brunensis, 10, 147–156.Google Scholar