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The authors are grateful to Niels Van Steenkiste, the staff at Hakai institute and the Bamfield Marine Sciences Centre for their assistance during the sampling. Martin V. S & oslash;rensen is greatly acknowledged for his guidance and for granting access to the facilities at the Natural History Museum of Denmark. We also extend our thanks to Anna Phillips and the staff at Smithsonian Institution for their support during KG's fellowship at the National Museum of Natural History in Washington, D.C. Hiroshi Yamasaki is acknowledged for facilitating the primer sequences for ITS. Sergio Alvarez Ortega is thanked for his help with the sequencing and use of light microscopy infrastructure at URJC. Maria Barrero is acknowledged for helping with the laboratory work. This work has been carried out with the support of the research grant MCIN/AEI/RYC2022/037128-I to MH, Fulbright Fellowship to KG PL/2019/43/SR, the Tula foundation and the National Sciences and Engineering Research Council of Canada (NSERC 2014-05258) to BSL.

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First evidence of cryptic diversity in mud dragons (kinorhyncha) and description of Echinoderes quasae sp. nov. from the northeastern pacific coast

Publicado en:Zoologischer Anzeiger. 313 241-254 - 2024-11-01 313(), DOI: 10.1016/j.jcz.2024.10.010

Autores: Herranz, Maria; Leander, Brian S; Grzelak, Katarzyna

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The genus Echinoderes, currently consisting of over 150 known species, has seen a surge in new descriptions since 2015. Species identification traditionally relies on morphological traits and morphometrics, but distinguishing closely related species is more and more challenging due to overlapping features and character variability. Cryptic diversity, where species are genetically distinct but morphologically identical, is common in meiofauna and suspected in kinorhynchs, though not previously confirmed. This study examines the northeastern Pacific Echinoderes fauna, using newly collected material and historical collections of the Smithsonian National Museum of Natural History. We describe a new species, Echinoderes quasae sp. nov., using a molecular and morphological approach and provide the first evidence of cryptic diversity in kinorhynchs, revealing at least two new species within a previously unrecognized cryptic complex.

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