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A new morphotype description of Arbacia spatuligera Valenciennes, 1846 (Arbacioida, Echinoidea) and bathymetric range extension from mesophotic reefs of the central coast of Chile

Published online by Cambridge University Press:  10 May 2024

Rigoberto Moreno-Mendoza*
Affiliation:
Doctorado en Ciencias con mención en Biodiversidad y Biorecursos, Facultad de Ciencias, Universidad Católicade la Santísima Concepción, Av. Alonso de Ribera 2850, Concepción, Chile Tamarugo Dive Center, Av. Blanca Estela 1927, Local 16, Concón, Chile
Erwan Courville
Affiliation:
Biogéosciences, UMR 6282 CNRS, Université de Bourgogne, 6 Boulevard Gabriel, 21000, Dijon, France Instituto Milenio de Ecosistemas Antárticos y Subantárticos (BASE) and Facultad de Ciencias, Universidad de Chile, Santiago, Chile
Luis Enrique Angeles-Gonzalez
Affiliation:
Departamento de Biotecnología, Centro de Investigación Científica y de Educación Superior de Ensenada, Zona Playitas, 22860, Ensenada, Baja California, México
Julio Duarte
Affiliation:
Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav), Unidad Mérida. Km. 6. Antigua carretera a Progreso, Mérida, México
Marc Carulla
Affiliation:
Tamarugo Dive Center, Av. Blanca Estela 1927, Local 16, Concón, Chile
Daniel Malfanti-Bravo
Affiliation:
Tamarugo Dive Center, Av. Blanca Estela 1927, Local 16, Concón, Chile
Andrés Mena-Auladell
Affiliation:
Tamarugo Dive Center, Av. Blanca Estela 1927, Local 16, Concón, Chile Vicerrectoría de Finanzas, Departamento TI, Universidad de las Américas, Manuel Montt 948, Santiago, Chile
Thomas Saucède
Affiliation:
Biogéosciences, UMR 6282 CNRS, Université de Bourgogne, 6 Boulevard Gabriel, 21000, Dijon, France
Nuno Simões
Affiliation:
Unidad Académica Sisal, Facultad de Ciencias, Universidad Nacional Autónoma de México, Puerto de Abrigo s/n, C.P. 97356, Sisal, México
Elie Poulin
Affiliation:
Instituto Milenio de Ecosistemas Antárticos y Subantárticos (BASE) and Facultad de Ciencias, Universidad de Chile, Santiago, Chile
*
Corresponding author: Rigoberto Moreno-Mendoza; Email: rmoreno@doctorado.ucsc.cl

Abstract

The sea urchin Arbacia spatuligera is an echinoid distributed in the Southeastern Pacific Ocean from Peru to Chile. This species was previously reported from the subtidal zone with a bathymetric distribution up to 30 m depth. In this work, 128 individuals were found in four mesophotic reefs along the central coast off Chile using closed-circuit rebreathers in technical diving at higher depths than previously, ranging from 36 to 63 m in depth. A population exhibits unexpected morphological characters, requiring an emended diagnosis and description of a new morphotype for A. spatuligera. These morphological traits are further discussed as potential ecophenotypic adaptations.

Information

Type
Research Article
Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press on behalf of Marine Biological Association of the United Kingdom

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