Yoshikawa, Natsuhiko, and Masafumi Matsui. 2014. “Two New Salamanders of the Genus Onychodactylus From Eastern Honshu, Japan (Amphibia, Caudata, Hynobiidae)”. Zootaxa 3866 (1). Auckland, New Zealand:53–78. https://doi.org/10.11646/zootaxa.3866.1.3.