Torres-Carrera Gerardo, Ruiz-Escobar Fernando, García-Prieto Luis, Oceguera-Figueroa Alejandro
Posgrado en Ciencias Biológicas, Instituto de Biología, Universidad Nacional Autónoma de México, C.P. 04510 Mexico City, Mexico; Laboratorio de Helmintología, Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, C.P. 04510 Mexico City, Mexico.
Programa de Biología Marina, Universidad del Mar campus Puerto Ángel, C.P. 70902 Oaxaca, Mexico.
Parasitol Int. 2020 Jun;76:102095. doi: 10.1016/j.parint.2020.102095. Epub 2020 Feb 27.
A new genus and species of Hexabothriidae Price, 1942 is described from specimens infecting the gill of the numbfish Narcine entemedor Jordan and Starks from the Pacific coast of Mexico. In addition to the new taxon described here, species of 8 genera also display symmetrical haptors and have eggs with two polar filaments. However, they differ in the combination of the following features: distal portion of the male copulatory organ tubular, unarmed and proximally dilated confining an internal coiled duct, as well as dorsal origin of haptoral appendix. Based on molecular data derived from 3 loci, the mitochondrial Cytochrome C oxidase subunit 1 as well as the nuclear ribosomal 18S and 28S, the new species was found nested within Hexabothriidae together with the other 4 genera with representatives in GenBank. This is the first species of Hexabothriidae reported from a species of Narcinidae.
从感染墨西哥太平洋沿岸的钝塘鳐（Narcine entemedor Jordan and Starks）鳃部的标本中，描述了六鳃科（Hexabothriidae Price, 1942）的一个新属和新物种。除了这里描述的新分类单元外，8个属的物种也显示出对称的抱器，并且卵带有两根极丝。然而，它们在以下特征组合上有所不同：雄性交配器官的远端呈管状，无武装且近端扩张，包围着一条内部盘绕的管道，以及抱器附属物的背侧起源。基于来自3个基因座的分子数据，即线粒体细胞色素C氧化酶亚基1以及核糖体18S和28S，发现该新物种与GenBank中有代表的其他4个属一起嵌套在六鳃科内。这是首次从电鳐科物种中报道的六鳃科物种。
