Resumo

RUIZ-NUNEZ, Ingrid Yutzil et al. Diversity analysis and new records of echinoderms (Echinodermata) for Revillagigedo National Park, Mexico. Rev. Mex. Biodiv. [online]. 2025, vol.96, e965557.  Epub 29-Set-2025. ISSN 2007-8706.  https://doi.org/10.22201/ib.20078706e.2025.96.5557.

Consisting of 4 tropical volcanic islands, the Revillagigedo Archipelago has unique and well-preserved ecosystems that have placed it on the UNESCO World Heritage List. The objective of this work was to present the updated inventory of echinoderms of Revillagigedo National Park, including new records of species of the classes Asteroidea and Ophiuroidea, and to analyze their composition. The diversity of the islands was evaluated by ecological analysis (species richness, similarity, and taxonomic distinctiveness). A total of 94 records of echinoderm species were obtained, of which 5 are new records, 2 sea stars (Heliaster kubiniji and Astrometis sertulifera) and 3 brittle stars (Ophiolepis variegata, Ophiopsila californica, and Ophiothela mirabilis). The class with the highest number of species in the park was Ophiuroidea with 31, followed by Asteroidea, Echinoidea, and Holothuroidea with 21 each. Clarion (60 spp.) and Socorro (58 spp.) islands had the highest species richness and taxonomic diversity. However, species richness in San Benedicto and Roca Partida may be underestimated due to less historical sampling effort on these islands.

Palavras-chave : Protected Natural Area; Eastern Pacific; Similarity; Taxonomic diversity; Oceanic islands.

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