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J. Moll. Stud. (2002), 68, 311-317
© The Malacological Society of London 2002

A NEW SPECIES OF CALMA ALDER & HANCOCK, 1855 (GASTROPODA: NUDIBRANCHIA) WITH A REVIEW OF THE GENUS

GONÇALO CALADO1,2 and VICTORIANO URGORRI2

1Unidade de investigação em Eco-Etologia, Instituto Superior de Psicologia Aplicada, Rua Jardim do Tabaco, 34, 1149-041, Lisbon, Portugal; and 2Laboratorio de Zooloxía Mariña, Departamento de Bioloxía Animal, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain

Correspondence: G. Calado; e-mail: bagoncas{at}mail.telepac.pt

This paper presents the description of a new species of the genus Calma (Alder & Hancock, 1855). To date only one valid species, Calma glaucoides (Alder & Hancock, 1854), has been assigned to this genus, which feeds exclusively upon eggs of littoral teleost fishes. New morphological and ecological data, and review of the literature on the species attributed to this genus, lead us to conclude that there are two distinct species previously put together under the same specific name. Calma gobioophaga new species is described based upon consistent morphological differences, such as the diameter and position of the eyes, the size of the propodial tentacles, and the size of the metanefridium. Whereas Calma gobioophaga feeds on spawn of Gobius niger, Calma glaucoides feeds on eggs of Lepadogaster lepadogaster, Lepadogaster purpurea, Lepadogaster candollei, Parablennius gattorugine, and Parablennius pilicornis.

(Received 3 September 2001; accepted 5 March 2002)


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