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Rohdella siamensis gen. et sp.nov. (Aspidogastridae: Rohdellinae subfam.nov.) from fresh water fishes in Thailand, with a reorganization of the classification of the subclass Aspidogastrea

Published online by Cambridge University Press:  06 April 2009

D. I. Gibson
Affiliation:
Zoology Department, British Museum (Natural History), London SW7 5BD and National Inland Fisheries Institute, Kasetsart University Campus, Bangken, Bangkok 10900, Thailand
S. Chinabut
Affiliation:
Zoology Department, British Museum (Natural History), London SW7 5BD and National Inland Fisheries Institute, Kasetsart University Campus, Bangken, Bangkok 10900, Thailand

Summary

Rohdella siamensis, a new genus and species of aspidogastrean, is described from freshwater fishes in Thailand. A new subfamily, the Rohdellinae, is erected to accommodate this worm on the grounds that it differs from all known aspidogastreans in that the male and female ducts unite to form an hermaphroditic duct, with the result that the intromittent organ is a sinus-organ and not a cirrus. A new classification of the subclass Aspidogastrea is presented. Two orders are recognized: the Aspidogastrida, containing a single family, the Aspidogastridae, which in turn contains 3 subfamilies, the Aspidogastrinae, the Cotylaspidinae and the Rohdellinae subfam.nov.; and the Stychocotylida ord.nov., containing 3 families, the Stichocotylidae, the Multicalycidae fam.nov. and the Rugogastridae. The systematic position of the Stichocotylida, and especially the Rugogastridae, is commented upon.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1984

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