Biström, O. & K. Watanabe, 2017. A new species of the genus Hydrovatus (Coleoptera, Dytiscidae) from Iriomote Island, Southwestern Japan, with a key to the Japanese species. Elytra, Tokyo, New Series, 7 (1) : 5-13.
Inahata, N. & Y. N. Minoshima, 2019. Occurrence of the tribe Chaetarthriini in Japan (Coleoptera: Hydrophilidae). Japanese Journal of systematic Entomology, 25 (1) : 95-96.