Sata Naoya, Nakano Takafumi
Department of Zoology, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
Department of Medical Entomology, National Institute of Infectious Disease, Tokyo 162-8640, Japan.
Zoolog Sci. 2020 Feb;37(1):70-78. doi: 10.2108/zs190004.
The taxonomic account of the tadpole-parasitic nematode Yamaguti, 1938, which is the type species of the genus, was reassessed based on syntypes and newly-collected specimens from the type locality. Our redescription of addresses the erroneous original description of a spicule in this nematode, and emends the diagnosis of the species. Additionally, molecular phylogenetic trees based on nuclear 18S and 28S rDNA sequences revealed that forms a distinctive lineage within the suborder Oxyurina, and this tadpole-specialist is phylogenetically close to the lizard-parasitic nematodes that belong to the family Pharyngodonidae. The results of morphological examination with the aid of molecular phylogenetic trees highlight the systematic uniqueness of this tadpole-parasitic group within Oxyurina, and Gyrinicolidae is accordingly resurrected as a distinctive oxyurinan family, with redefinition of the family and the genus .
基于同模标本和从模式产地新采集的标本，对1938年的蝌蚪寄生线虫（该属的模式种）的分类描述进行了重新评估。我们对该线虫的重新描述纠正了其交接刺的原始错误描述，并修订了该物种的诊断。此外，基于核18S和28S rDNA序列构建的分子系统发育树表明，该线虫在尖尾亚目内形成了一个独特的谱系，并且这种蝌蚪专性寄生虫在系统发育上与属于咽齿科的蜥蜴寄生线虫相近。借助分子系统发育树进行形态学检查的结果突出了该蝌蚪寄生类群在尖尾亚目内的系统独特性，因此，旋尾科被重新确立为一个独特的尖尾亚目科，并对该科和该属进行了重新定义。
