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First record of the genus Onchidoris (Gastropoda: Nudibranchia: Onchidorididae) from the South Atlantic Ocean, with the description of a new species from Brazil

Published online by Cambridge University Press:  07 February 2011

Juliana Alvim ,
Vinicius Padula  and
Alexandre Dias Pimenta
Juliana Alvim*
Affiliation:
Departamento de Invertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista s/n, São Cristóvão, Rio de Janeiro, RJ, Brasil, CEP, 20940–040 Zoologische Staatssammlung München/Bavarian State Collection of Zoology, Mollusca Department, Münchhausenstrasse 21, 81247 München, Germany
Vinicius Padula
Affiliation:
Zoologische Staatssammlung München/Bavarian State Collection of Zoology, Mollusca Department, Münchhausenstrasse 21, 81247 München, Germany
Alexandre Dias Pimenta
Affiliation:
Departamento de Invertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista s/n, São Cristóvão, Rio de Janeiro, RJ, Brasil, CEP, 20940–040
*
Correspondence should be addressed to: J. Alvim, Departamento de Invertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista s/n, São Cristóvão, Rio de Janeiro, RJ, Brasil, CEP, 20940–040 email: juju_alvim@yahoo.com.br
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Abstract

A new species of the genus Onchidoris is described from the south-western Atlantic, on the coast of Brazil, in the States of Rio de Janeiro and São Paulo. To date, the genus Onchidoris is known almost exclusively from the northern hemisphere, especially the Atlantic coast of Europe and the Mediterranean Sea. The single previous record from the southern hemisphere is Onchidoris maugeansis, described from Australia. This is the first record of the family Onchidorididae from the coast of Brazil. Onchidoris brasiliensis sp. nov. is very similar to Onchidoris depressa, from England and the northern coast of Spain, but is distinguished by the presence of a triangular protuberance on the edge of the inner lateral radular tooth and a wide closed branchial circle with tubercles inside. Furthermore, the egg mass of O. brasiliensis sp. nov. contains a single row of eggs, whereas that of O. depressa has multiple rows. Onchidoris brasiliensis sp. nov. has lecithotrophic development, the first record of this type of development in the genus. There is a relationship between O. brasiliensis sp. nov. and the bryozoan Parasmittina protecta.

Keywords

Onchidoris brasiliensis sp. nov.Doridaceasouth-western Atlantictaxonomylecithotropic larvaeParasmittina protecta
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 91 , Special Issue 2: Biodiversity and Taxonomy , March 2011 , pp. 505 - 511
Copyright
Copyright © Marine Biological Association of the United Kingdom 2011

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References

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