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Monanchora brasiliensis sp. nov. (Poecilosclerida: Demospongiae), new crambeid from the Brazilian coast, south-western Atlantic, with monodentate anchorate chelae

Published online by Cambridge University Press:  22 May 2012

Eduardo L. Esteves ,
Cléa Lerner ,
Gisele Lôbo-Hajdu  and
Eduardo Hajdu
Eduardo L. Esteves*
Affiliation:
Departamento de Zoologia, Instituto de Biologia Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, 20550-013, Rio de Janeiro, RJ, Brazil Departamento de Invertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, s/n, 20940-040, Rio de Janeiro, RJ, Brazil
Cléa Lerner
Affiliation:
Museu de Ciências Naturais, Fundação Zoobotânica do Rio Grande do Sul, Rua Dr Salvador França, 1427, 90690-000, Porto Alegre, RS, Brazil
Gisele Lôbo-Hajdu
Affiliation:
Departamento de Genética, Instituto de Biologia Roberto Alcântara Gomes, Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524–PHLC–Sala 205, 20550–013, Rio de Janeiro, RJ, Brazil
Eduardo Hajdu
Affiliation:
Departamento de Invertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, s/n, 20940-040, Rio de Janeiro, RJ, Brazil
*
Correspondence should be addressed to: E.L. Esteves, Departamento de Invertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, s/n, 20940–040, Rio de Janeiro, RJ, Brazil email: [email protected]
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Abstract

A new Brazilian endemic Monanchora is described, M. brasiliensis sp. nov. It is clearly distinct from any other species in the genus by the monodentate shape of its anchorate isochelae, and its smooth, centrotylote and strongyloid microrhabds. Monodentate anchorate isochelae are relatively common, normally abundant, and represent the main diagnostic character for recognizing the new species, but microrhabds are usually rare and may be even absent. Monanchora brasiliensis sp. nov. can be further differentiated from other Atlantic species of the genus in eventually showing tetralobate branches and a skeleton formed by well-defined honey-coloured spongin fibres. The affinities of the new species with other crambeids and the nature of anchorate isochelae, microrhabds as well as the megascleres in defining Monanchora are discussed. An amended diagnosis for the genus is proposed.

Keywords

taxonomyMyxillinaPoriferaSouth AmericaBrazil
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 92 , Issue 5 , August 2012 , pp. 869 - 876
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012

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