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A Key to the Cercariae from British Freshwater Molluscs

Published online by Cambridge University Press:  18 November 2009

P. Nasir  and
David A. Erasmus
P. Nasir
Affiliation:
Department of Biology, Universidad de Oriente, Cerro Colorado, Cumana, Venezuela.
David A. Erasmus
Affiliation:
Department of Zoology, University College, Cardiff.
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Extract

The study of larval trematode parasites of freshwater molluscs is a field which has been much neglected in Great Britain. Renewed interest has appeared in recent years and this, together with the scattered nature of the literature, has prompted the construction of a key which will aid in the identification of cercarial stages emerging from freshwater molluscs.

In many cases it will be noted that the author and date associated with the species may not be that of the original author but will represent the most recent and complete description of the form. A few of, the early descriptions do not contain sufficient detail to allow very precise demarcation from closely related animals but an attempt has been made to separate them in the present text. As far as possible, easily distinguishable morphological features have been employed, but in some cases reference to the excretory formula and floating position in the water is necessary.

Type
Research Papers
Information
Journal of Helminthology , Volume 38 , Issue 3-4 , December 1964 , pp. 245 - 268
Copyright
Copyright © Cambridge University Press 1964

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