ishigakiensis, Rhinogobius aonumai Suzuki [T.], Oseko [N.], Yamasaki [Y. Y.], Kimura [S.] & Shibukawa [K.] 2022:22, Figs. 9-15, 17B [Bulletin of the Kanagawa Prefectural Museum (Natural Science) No. 51; ref. 39148] Sakuta-gawa River, upper reaches above some falls (total vertical height about 100 meters), Ishigaki-jima Island, Yaeyama Group of the Ryukyu Islands, Japan, elevation 165 meters. Holotype: SPMN PI 49269. Paratypes: (11) KPM, OMNH, SPMN. •Synonym of Rhinogobius aonumai Suzuki, Oseko, Yamasaki, Kimura & Shibukawa 2022, but a valid subspecies as described. Current status: Synonym of Rhinogobius aonumai Suzuki, Oseko, Yamasaki, Kimura & Shibukawa 2022. Oxudercidae: Gobionellinae. Distribution: Western Pacific: Ishigaki-jima Island, Ryukyu Islands, Japan [this subspecies]. Habitat: freshwater.