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<p><i>Cochimibdella mexicana</i> <b>n. gen. n. sp.</b> is described based on morphological data and comparative analysis of DNA sequences, including two mitochondrial (cytochrome oxidase subunit I and 12s rRNA) and nuclear (18S rRNA and 28S rRNA) loci. Leech specimens were found in the mantle cavity and external surface of the octopus <i>Octopus bimaculatus</i> from Bahía de los Ángeles, Baja California, México. <i>In vivo</i> observations of recently hatched leeches in the laboratory confirm a broad prey range, including fishes, the most common hosts of the family species. The new taxon differs from species of the family Piscicolidae in possession of weakly developed tubercles in a3 of the urosome. In addition, molecular analysis places <i>Cochimibdella mexicana</i> <b>n. gen. n. sp.</b> sister to <i>Austrobdella californiana</i> and <i>Myzobdella lugubris</i>. This work amends a previous record of the elasmobranch-feeding leech <i>Pontobdella</i> (=<i>Stibarobdella</i>) <i>moorei</i> as a parasite of <i>Octopus bimaculatus</i> from the type locality of the new taxon.</p>

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Cochimibdella mexicana n. gen. n. sp. (Hirudinida: Piscicolidae), from Octopus bimaculatus Verrill (Cephalopoda: Octopodidae) in the Gulf of California, Mexico

  • 期刊论文

  • 发表日期：

    2025年2月16日

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  • Fernando Ruiz-Escobar,
  • Graciela E. Colunga-Ramírez,
  • Alejandro Oceguera-Figueroa,
  • Sheila Castellanos-Martínez

摘要

Cochimibdella mexicana n. gen. n. sp. is described based on morphological data and comparative analysis of DNA sequences, including two mitochondrial (cytochrome oxidase subunit I and 12s rRNA) and nuclear (18S rRNA and 28S rRNA) loci. Leech specimens were found in the mantle cavity and external surface of the octopus Octopus bimaculatus from Bahía de los Ángeles, Baja California, México. In vivo observations of recently hatched leeches in the laboratory confirm a broad prey range, including fishes, the most common hosts of the family species. The new taxon differs from species of the family Piscicolidae in possession of weakly developed tubercles in a3 of the urosome. In addition, molecular analysis places Cochimibdella mexicana n. gen. n. sp. sister to Austrobdella californiana and Myzobdella lugubris. This work amends a previous record of the elasmobranch-feeding leech Pontobdella (=Stibarobdella) moorei as a parasite of Octopus bimaculatus from the type locality of the new taxon.