Article Dans Une Revue Journal of the Marine Biological Association of the UK Année : 2024

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

Résumé

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.
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Dates et versions

hal-04596433 , version 1 (18-02-2025)

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Rigoberto Moreno-Mendoza, Erwan Courville, Luis Enrique Angeles-Gonzalez, Julio Duarte, Marc Carulla, et al.. A new morphotype description of Arbacia spatuligera Valenciennes, 1846 (Arbacioida, Echinoidea) and bathymetric range extension from mesophotic reefs of the central coast of Chile.. Journal of the Marine Biological Association of the UK, 2024, 104, pp.e48. ⟨10.1017/S0025315424000389⟩. ⟨hal-04596433⟩
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