Lagunas-Calvo Omar, Santacruz Ana, Hernández-Mena David Iván, Rivas Gerardo, Pérez-Ponce de León Gerardo, Aguilar-Aguilar Rogelio
Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autónoma de México, Apartado Postal 70-399, C. P. 04510, Ciudad de México, Mexico.
Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Parasitol Res. 2019 Feb;118(2):441-452. doi: 10.1007/s00436-018-6189-8. Epub 2019 Jan 10.
The genus Rhabdochona includes more than 100 species infecting freshwater fishes in all zoogeographical regions of the world. In Mexico, 12 nominal species of Rhabdochona have been recorded. Of these, Rhabdochona ictaluri was originally described as a parasite of endemic catfishes of the family Ictaluridae; however, the species was later considered on morphological grounds as a junior synonym of Rhabdochona kidderi. In this study, newly sampled specimens of R. ictaluri were obtained from the type host and type locality and were used to perform a detailed morphological analysis and molecular phylogenetic inferences through one mitochondrial and two nuclear genes; data were used in an integrative taxonomy context to test the taxonomic status of R. ictaluri. This approach proved to be very useful to confirm the validity of this species, and robust species limits were established between these two putative species considering morphology, molecular data, host association, and biogeography.
杆咽线虫属包括100多种，感染世界所有动物地理区域的淡水鱼。在墨西哥，已记录到12种杆咽线虫的命名物种。其中，艾氏杆咽线虫最初被描述为鲇科特有鲶鱼的寄生虫；然而，后来基于形态学原因，该物种被认为是基氏杆咽线虫的次异名。在本研究中，从模式宿主和模式产地获得了新采集的艾氏杆咽线虫标本，并通过一个线粒体基因和两个核基因进行了详细的形态学分析和分子系统发育推断；这些数据被用于综合分类学背景下，以检验艾氏杆咽线虫的分类地位。事实证明，这种方法对于确认该物种的有效性非常有用，并且综合形态学、分子数据、宿主关联和生物地理学，在这两个假定物种之间建立了明确的物种界限。
