The taxonomic account of the tadpole-parasitic nematode Gyrinicola japonicaYamaguti, 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 G. japonica 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 G. japonica 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 Gyrinicola.
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24 January 2020
Redescription of Gyrinicola japonica, a Tadpole-Endoparasitic Nematode from Japan, with Resurrection of the Family Gyrinicolidae (Nematoda: Oxyurina)
Naoya Sata,
Takafumi Nakano
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Zoological Science
Vol. 37 • No. 1
February 2020
Vol. 37 • No. 1
February 2020
emended diagnosis
molecular phylogeny
Oxyuroidea
Rhacophorus arboreus
Syntype