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Opistholebes diodontis n.sp., its development in the final host, the affinities of some amphistomatous trematodes from marine fishes and the allocreadioid problem

Published online by Cambridge University Press:  06 April 2009

R. M. Cable
R. M. Cable
Affiliation:
Department of Biological Sciences, Purdue University, Lafayette, Indiana, U.S.A.
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Extract

Opistholebes diodontis n.sp. is described from the intestine of the porcupine fish, Diodon hystrix, and development from the metacercaria to the adult is outlined. In that process, the ventral sucker shifts from near the mid-level to the posterior end of the body and other rearrangements occur as a result of differential growth. Hence in the Opistholebetidae and probably the Gyliauchenidae and Cephalo-poridae as well, the amphistome plan is considered to be secondary in phylogeny. None of those families belongs in the Paramphistomoidea. Instead, each is believed to be a distinct family of aberrant trematodes derived from a separate line of more generalized distomes. Representing one such line of descent are the Opistholebetidae and Opecoelidae which are more closely related to each other than either is to any other group. Hence a superfamily, Opecoeloidea, is proposed to include the two families and set them apart as a natural group distinct from the remainder of the allocreadioid complex which is discussed. The genus Pachycreadium is transferred to the Opistholebetidae, family diagnoses are revised, and a key to the species of Opistholebes is given.

Type
Research Article
Information
Parasitology , Volume 46 , Issue 1-2 , May 1956 , pp. 1 - 13
Copyright
Copyright © Cambridge University Press 1956

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References

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