Salamanders of the tribe Bolitoglossini Hallowell are a highly diversified group of amphibians, and their helminth parasite fauna has been scarcely studied. Some species of plethodontid salamanders distributed along the Trans-Mexican Volcanic Belt, in central Mexico, were sampled, and their helminth parasites were recovered for taxonomic identification. Specimens of a pharyngodonid nematode from 2 species of bolitoglossines of the genus Pseudoeurycea Taylor were morphologically identified as Batracholandros salamandrae (Schad, 1960) Petter and Quentin, 1976. These specimens were studied in further detail through light and scanning electron microscopy and were sequenced for 2 ribosomal genes and 1 mitochondrial gene to test the hypothesis of whether B. salamandrae is a species widely distributed in salamanders across the Nearctic biogeographic region, or if it represents a cryptic species complex. Our molecular results revealed that these specimens consisted of 2 genetic lineages in concordance with host species, although with slight morphological differences among specimens in each of them. A thorough study, including the generation of molecular data from individuals from other areas of North America, and the examination of type specimens, is required to test the reliability of these morphological differences and to corroborate the species identity of the 2 genetic lineages.

Bolitoglossini Hallowell部落的am是两栖动物高度多样化的群体，对其蠕虫寄生动物区系很少进行研究。采集了墨西哥中部跨墨西哥火山带分布的一些正牙动物sal，并对其蠕虫寄生虫进行了分类鉴定。从形态学上鉴定出来自泰勒假单胞菌泰勒属的2种硅藻毒素的咽线虫的标本，形态学上鉴定为Batracholandros salamandrae（Schad，1960）Petter and Quentin，1976。通过光和扫描电子显微镜对这些标本进行了更详细的研究，并对其进行了测序核糖体基因和1个线粒体基因来检验是否存在沙门氏菌假说是一种物种，广泛分布在整个北欧生物地理地区的sal中，或者代表一种隐蔽物种。我们的分子结果表明，这些标本由2个与宿主物种一致的遗传谱系组成，尽管每个标本之间的形态差异很小。需要进行彻底的研究，包括从北美其他地区的个体生成分子数据，以及检查类型标本，以测试这些形态学差异的可靠性并证实这两个遗传谱系的物种同一性。