Ruiz-Escobar Fernando, Colunga-Ramírez Graciela E, Oceguera-Figueroa Alejandro, Castellanos-Martínez Sheila
Doctorado en Ciencias en Oceanografía Costera, Instituto de Investigaciones Oceanológicas-Facultad de Ciencias Marinas, Universidad Autónoma de Baja California, Carretera Transpeninsular Ensenada-Tijuana No. 3917 Fraccionamiento Playitas, C.P. 22860, Ensenada, Baja California, Mexico.
Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Carretera Transpeninsular Ensenada-Tijuana No. 3917 Fraccionamiento Playitas, C.P. 22860, Ensenada, Baja California, Mexico.
Syst Parasitol. 2025 Feb 16;102(2):23. doi: 10.1007/s11230-025-10217-z.
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.
基于形态学数据以及对包括两个线粒体基因座（细胞色素氧化酶亚基I和12s rRNA）和核基因座（18S rRNA和28S rRNA）的DNA序列的比较分析，描述了墨西哥科奇米蛭属新属新种。水蛭标本发现于墨西哥下加利福尼亚州洛杉矶湾双斑蛸的外套腔和体表。在实验室对刚孵化的水蛭进行的活体观察证实其猎物范围广泛，包括鱼类，鱼类是该科物种最常见的宿主。这个新分类单元与鱼蛭科物种的区别在于其尾节a3上的瘤突发育较弱。此外，分子分析表明墨西哥科奇米蛭属新属新种是加利福尼亚澳蛭和悲哀蛭的姊妹种。这项工作修正了之前关于以板鳃亚类为食的水蛭摩尔舟蛭（= 纹胸蛭）作为新分类单元模式产地双斑蛸寄生虫的记录。
