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Two new Hyalonema species (Hyalonematidae: Amphidiscosida) from eastern and south-eastern Brazil, and further Hexactinellida (Porifera) collected from seamounts off south-eastern Brazil by the RV ‘Marion Dufresne’ MD55 expedition

Published online by Cambridge University Press:  15 April 2009

Konstantin R. Tabachnick ,
Larisa L. Menshenina ,
Daniela A. Lopes  and
Eduardo Hajdu
Konstantin R. Tabachnick
Affiliation:
P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia
Larisa L. Menshenina
Affiliation:
Moscow State University, Moscow, Russia
Daniela A. Lopes
Affiliation:
Museu Nacional, Departamento de Invertebrados, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Eduardo Hajdu*
Affiliation:
Museu Nacional, Departamento de Invertebrados, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
*
Correspondence should be addressed to: E. Hajdu, Museu Nacional, Departamento de Invertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, s/n, 20940-04, Rio de Janeiro, RJ, Brazil email: [email protected]
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Abstract

Descriptions of hexactinellid sponges collected by the RV ‘Marion Dufresne’ MD55 expedition on the Vitória–Trindade seamounts chain (off Espírito Santo State, south-eastern Brazil) in 1987 and stored in the MNHN (Muséum National d'Histoire Naturelle in Paris) are presented. Hyalonema (Cyliconema) conqueror sp. nov. (the first finding of this subgenus in the Atlantic Ocean) and H. (Prionema) dufresnei sp. nov. (the second record of this subgenus for the Atlantic Ocean) are described as new species. The holotype of H. (C.) conqueror sp. nov. was collected with a ROV at Campos Basin (off Rio de Janeiro State, south-eastern Brazil), while the paratypes originated from Vitória–Trindade seamounts chain and off Bahía State (eastern Brazil). Other hexactinellids reported here, Farrea sp., Sarostegia aff. oculata, Aphrocallistes aff. beatrix, Dactylocalyx aff. subglobosus and Euplectella suberea were known before to be widely distributed in the Atlantic Ocean. The total number of hexactinellid sponges known from Brazil has risen to 15 and from the south-western Atlantic to 23.

Keywords

PoriferaHexactinellidataxonomynew speciessouth-eastern BrazilVitória–Trindade seamouts chain
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 89 , Issue 6 , September 2009 , pp. 1243 - 1250
Copyright
Copyright © Marine Biological Association of the United Kingdom 2009

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