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A new species of Ophiocoma (Echinodermata: Ophiuroidea) from Archipelago Trindade and Martin Vaz, Southeastern Atlantic, and redescription of Ophiocoma echinata

Published online by Cambridge University Press:  10 July 2023

Helena Serrano Open the ORCID record for Helena Serrano [Opens in a new window] ,
Cecília J. S. Damiano ,
Renata A. S. Alitto Open the ORCID record for Renata A. S. Alitto [Opens in a new window] ,
Pablo D. B. Guilherme ,
Walter R. P. Cerqueira ,
Joel B. Mendonça ,
Marcos Tavares  and
Michela Borges
Helena Serrano*
Affiliation:
University of Campinas, Institute of Biology, Museum of Biological Diversity – MDBio – Institute of Biology, State University of Campinas – Zoology Area (ZUEC), Campinas, São Paulo, Brazil
Cecília J. S. Damiano
Affiliation:
University of Campinas, Institute of Biology, Museum of Biological Diversity – MDBio – Institute of Biology, State University of Campinas – Zoology Area (ZUEC), Campinas, São Paulo, Brazil
Renata A. S. Alitto
Affiliation:
School of Education, University of São Paulo, São Paulo, Brazil
Pablo D. B. Guilherme
Affiliation:
Collegiate of Biological Sciences, University of Paraná, Paranaguá, Paraná, Brazil
Walter R. P. Cerqueira
Affiliation:
Department of Biological Sciences, University of Feira de Santana, Feira de Santana, Bahia, Brazil
Joel B. Mendonça
Affiliation:
Zoology Museum, University of São Paulo, São Paulo, Brazil
Marcos Tavares
Affiliation:
Zoology Museum, University of São Paulo, São Paulo, Brazil
Michela Borges
Affiliation:
University of Campinas, Institute of Biology, Museum of Biological Diversity – MDBio – Institute of Biology, State University of Campinas – Zoology Area (ZUEC), Campinas, São Paulo, Brazil
*
Corresponding author: Helena Serrano; Email: helenasrn92@gmail.com
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Abstract

The brittle stars of the family Ophiocomidae inhabit shallow waters and coral reefs of tropical regions. The species of Ophiocoma are difficult to identify due to high morphological variation, especially when different stages of development are observed. Here, based on morphological analyses, two Brazilian morphotypes of Ophiocoma were studied and characterized, Ophiocoma sp. NB (Northeastern Brazil) and Ophiocoma sp. TMV (Trindade and Martin Vaz Archipelago), and subsequently thoroughly analysed to confirm whether they were the same species or not. After the morphological studies, including external morphology, morphometry and microstructural characters, and analysis of molecular data, involving the 16S gene, it was concluded that Ophiocoma sp. NB and Ophiocoma sp. TMV do not correspond to the same species, the first being identified as Ophiocoma echinata (Lamarck, 1816) and the latter being a new species. This new species is characterized by two tentacle scales on the first arm segment and then one on all following segments, and the dorsalmost arm spines are robust and rounded, as wide as long or almost as wide as long.

Keywords

brittle starsDNA barcodingdorsalmost arm spinesintegrative taxonomymorphometryOphiocomidaeSouth Atlantictaxonomytentacle scale
Type
Marine Record
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 103 , 2023 , e49
Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of Marine Biological Association of the United Kingdom

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