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Type: Article
Published: 2018-08-31
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New sciaphilic plakinids (Porifera, Homoscleromorpha) from the Central-Western Pacific

Departamento de Invertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro. Quinta da Boa Vista, s/no, São Cristóvão. 20940-040 Rio de Janeiro, RJ, Brazil.
Departamento de Invertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro. Quinta da Boa Vista, s/no, São Cristóvão. 20940-040 Rio de Janeiro, RJ, Brazil.
Institut Méditerranéen de Biodiversité et d'Écologie Marine et Continentale (IMBE), UMR 7263 CNRS, IRD—Aix-Marseille Université—Université d'Avignon. Station Marine d'Endoume. Rue de la Batterie des Lions. 13007 Marseille, France.
Institut Méditerranéen de Biodiversité et d'Écologie Marine et Continentale (IMBE), UMR 7263 CNRS, IRD—Aix-Marseille Université—Université d'Avignon. Station Marine d'Endoume. Rue de la Batterie des Lions. 13007 Marseille, France.
Porifera Homosclerophorida morphology new species taxonomy submarine caves Pacific Ocean

Abstract

The sponge class Homoscleromorpha is a key model for the evolutionary biology of the Metazoa but its diversity remains poorly known. Here we describe six new species of the homoscleromorph family Plakinidae found in shaded habitats (submarine caves, tunnels and overhangs) of New Caledonia and Marquesas Islands, Central-Western Pacific. The new species belong to four genera: Corticium (Corticium vaceleti sp. nov.), Plakina (Plakina finispinata sp. nov.), Plakinastrella (Plakinastrella osculifera sp. nov., Plakinastrella nicoleae sp. nov. and Plakinastrella pseudolopha sp. nov.), and Plakortis (Plakortis ruetzleri sp. nov.). Plakinastrella pseudolopha sp. nov. has a novel spicule type called here ‘pseudolophose spicules’. The diversity of Homoscleromorpha is raised to 50 species in the Pacific Ocean and 120 spp. worldwide.

 

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