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A new species of Marionia (Opisthobranchia: Nudibranchia: Tritoniidae) from the tropical South Atlantic Ocean

Published online by Cambridge University Press:  21 March 2013

Felipe De Vasconcelos Silva ,
Carlos Augusto Oliveira de Meirelles  and
Helena Matthews-Cascon
Felipe De Vasconcelos Silva*
Affiliation:
LIMCE–Laboratório de Invertebrados Marinhos do Ceará, Universidade Federal do Ceará, Centro de Ciências, Departamento de Biologia, Bloco 909–Campus do Pici, CEP. 60455-970Fortaleza–Ceará–Brazil
Carlos Augusto Oliveira de Meirelles
Affiliation:
LIMCE–Laboratório de Invertebrados Marinhos do Ceará, Universidade Federal do Ceará, Centro de Ciências, Departamento de Biologia, Bloco 909–Campus do Pici, CEP. 60455-970Fortaleza–Ceará–Brazil
Helena Matthews-Cascon
Affiliation:
LIMCE–Laboratório de Invertebrados Marinhos do Ceará, Universidade Federal do Ceará, Centro de Ciências, Departamento de Biologia, Bloco 909–Campus do Pici, CEP. 60455-970Fortaleza–Ceará–Brazil
*
Correspondence should be addressed to: F. De Vasconcelos Silva, LIMCE–Laboratório de Invertebrados Marinhos do Ceará, Universidade Federal do Ceará, Centro de Ciências, Departamento de Biologia Bloco 909–Campus do Pici, CEP. 60455-970Fortaleza–Ceará–Brazil email: leafyn@yahoo.com.br
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Abstract

A new species of the family Tritoniidae is described for the tropical South Atlantic Ocean. The animal was found off north-east Brazil. Marionia limceana sp. nov. is up to 31 mm long, with a sturdy white body, of which the notum is covered with two rows of red polygons running from the rhinophores to the tail; notum with tubers; bi-lobed veil with 16 velar papillae; retractable white rhinophores; 11–14 pairs of branchial plumes; the anus is located below the 4th gill on the right side, and the genital opening is under the 3rd gill. Internally, M. limceana sp. nov. is distinguished from other tritoniids by jaws with three or four rows of denticles on the inner lips, a belt of 18 stomach plates; and the radular formula 26 × 26–32.1.1.1.26–32 teeth. The animal was found feeding on octocorals of a species of the new genus Stragulum, and is the first reported nudibranch to feed on this genus.

Keywords

Marionia limceana sp. nov.descriptiontaxonomyNudibranchiaDendronotinatropical AtlanticStragulum bicolor
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 93 , Issue 6 , September 2013 , pp. 1617 - 1624
Copyright
Copyright © Marine Biological Association of the United Kingdom 2013 

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