*Matsui M., Okawa, H., Nishikawa K., Aoki, G., Eto, K., Yoshikawa, N., Tanabe, S. Misawa, Y. & Tominaga, A. 2019. Systematics of the widely distributed Japanese clouded salamander, ''Hynobius nebulosus'' (Amphibia: Caudata: Hynobiidae), and its closest relatives. Current Herpetol. 38(1): 32-90.
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*Sugawara, H., Iwata, T., Yamashita, H. & Nagano M, 2021. Taxonomic Reassessment of the Izumo Lineage of ''Hynobius utsunomiyaorum'': Description of a New Species from Chugoku, Japan. Animals 11(8):2187. https://doi.org/10.3390/ani11082187