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On the European species of Eubranchus [Mollusca Opisthobranchia]

Published online by Cambridge University Press:  11 May 2009

Malcolm Edmunds  and
Annetrudi Kress
Malcolm Edmunds
Affiliation:
Department of Zoology, University of Ghana, Legon, Ghana
Annetrudi Kress
Affiliation:
Anatomisches Institut der Technischen Hochschule Aachencor1corresp
1
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Extract

On the basis of extensive material from Plymouth an attempt has been made to determine the specific limits of the European species of the eolid genus Eubranchus Forbes. From a study of the living animals, jaws, radulae and reproductive systems, it is concluded that five species can be recognized as occurring commonly in Britain, Eubranchus tricolor Forbes (=Galvina viridula Bergh), E. farrani (Alder & Hancock), E. pallidus (Alder & Hancock), E. cingulatus (Alder & Hancock) and E. exiguus (Alder & Hancock). These species are all variable in coloration, but they can nevertheless be easily distinguished by coloration as well as by morphological and ecological characteristics. A further species, E. doriae (Trinchese) from the Mediterranean, was also examined and appears to be distinct. No material of Eubranchus rupiurn (Moller) and E. vittatus (Alder & Hancock) was available for examination, but these are provisionally maintained as distinct species. The European species of Eubranchus are compared with species from other parts of the world in an attempt to decide how many genera should be recognized. It is concluded that the armature of the penis and the liver branching do not form good generic characters, and that consequently Capellinia is to be regarded as a junior synonym of Eubranchus.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 49 , Issue 4 , November 1969 , pp. 879 - 912
Copyright
Copyright © Marine Biological Association of the United Kingdom 1969

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