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A new species of Acanthocyclops Kiefer, 1927 (Copepoda, Cyclopoida) from ephemeral and permanent waterbodies of Sian Ka’an and Calakmul biosphere reserves, Mexico

In: Crustaceana
Authors:
Nancy F. Mercado-Salas Leibniz Institute for the Analysis of Biodiversity Change, Centre for Taxonomy and Morphology, Museum of Nature Hamburg, Zoology, Martin-Luther-King-Platz 3, 20146 Hamburg, Germany

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https://orcid.org/0000-0001-8303-3585
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Eduardo Suárez-Morales Department of Systematics and Aquatic Ecology, El Colegio de la Frontera Sur (ECOSUR), Av. Centenario Km 5.5, Chetumal, Quintana Roo 77014, Mexico

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https://orcid.org/0000-0003-2051-8707
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Sahar Khodami Senckenberg am Meer Wilhelmshaven, German Centre for Marine Biodiversity Research, Südstrand 44, 26382, Wilhelmshaven, Germany

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https://orcid.org/0000-0002-7944-4004
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Pedro Martínez Arbizu Senckenberg am Meer Wilhelmshaven, German Centre for Marine Biodiversity Research, Südstrand 44, 26382, Wilhelmshaven, Germany

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https://orcid.org/0000-0002-0891-1154
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Abstract

A new species of the genus Acanthocyclops is described from temporal freshwater bodies in the Sian Ka’an and Calakmul Biosphere Reserves in Southeast Mexico. Acanthocyclops fiersi n. sp. represents the third species of the genus described from the Neotropics, only after A. rebecae and A. smithae. Acanthocyclops fiersi n. sp., is recognized as a member of the A. vernalis-robustus species-complex, and its clear divergence with respect to its congeners was supported using comparative morphology and molecular methods. The mtCOI marker revealed a 0.54% K2P divergence within populations of A. fiersi n. sp. and 17.6-22.41% with respect to other members of the A. vernalis-robustus species-complex. Acanthocyclops fiersi n. sp. might be restricted to the Yucatán Peninsula. Comments about the likely underestimated regional diversity of Acanthocyclops and the need of further studies in the Neotropics are provided. An identification key to the species of Acanthocyclops distributed in Mexico is included.

Resumen

Se describe una nueva especie de Acanthocyclops de cuerpos de agua temporales en las Reservas de la Biosfera de Sian Ka’an y Calakmul en el sureste de México. Acanthocyclops fiersi n. sp. representa la tercera especie del género descrita para el Neotrópico, solo después de A. rebecae y A. smithae. Acanthocyclops fiersi n. sp. es reconocida como miembro del complejo de especies A. vernalis-robustus, y su diferenciación con respecto a sus congéneres se sostiene usando morfología comparativa y métodos moleculares. El gen mtCOI reveló una divergencia de K2P del 0.54% dentro de poblaciones de Acanthocyclops fiersi n. sp. y de 17.6-22.41% con respecto a otros miembros conocidos del complejo de especies A. vernalis-robustus. Acanthocyclops fiersi n. sp., podría estar restringida a la península de Yucatán. Se comenta acerca de la diversidad regional, probablemente subestimada, del género Acanthocyclops y de la necesidad de más estudios en el Neotrópico. También se incluye una clave de identificación de las especies de Acanthocyclops distribuidas en México.

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