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<p><i>Coronarctus</i> Renaud-Mornant, 1974, is currently composed of eleven species, which are found in deep sea and shallow environments. We described a new species of <i>Coronarctus</i>, as well as doing a morphometric analysis and providing an identification key, from specimens collected in deep-sea sediments (1,182–2,822&#xa0;m) in the southern Gulf of Mexico. <i>Corononarctus xiximii</i> sp. nov. is characterized by spherical primary clavae and flattened secondary clavae, each with two dorsal and two ventral lobes; sensory organs on each pair of legs and additional flexible spine-like processes on legs IV, and heteromorphic, simple claws, with the internal claw of leg IV being twice the size of the external claws. This discovery increases the number of <i>Coronarctus</i> species worldwide to twelve.</p>

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A new species of Coronarctus (Tardigrada, Heterotardigrada) in the deep sea from the Gulf of Mexico revealed by geometric morphometrics and an updated genus key

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月21日

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  • Rubén Nahúm Delgado-Reyes,
  • Francisco Armendariz-Toledano,
  • Griselda Montiel-Parra,
  • Axayácatl Rocha-Olivares,
  • Gerardo Rivas

摘要

Coronarctus Renaud-Mornant, 1974, is currently composed of eleven species, which are found in deep sea and shallow environments. We described a new species of Coronarctus, as well as doing a morphometric analysis and providing an identification key, from specimens collected in deep-sea sediments (1,182–2,822 m) in the southern Gulf of Mexico. Corononarctus xiximii sp. nov. is characterized by spherical primary clavae and flattened secondary clavae, each with two dorsal and two ventral lobes; sensory organs on each pair of legs and additional flexible spine-like processes on legs IV, and heteromorphic, simple claws, with the internal claw of leg IV being twice the size of the external claws. This discovery increases the number of Coronarctus species worldwide to twelve.