ryukyuensis, Luciogobius Chen [I-S.], Suzuki [T.] & Senou [H.] 2008:248, Figs. 1-3 [Journal of Marine Science and Technology v. 16 (no. 4); ref. 30075] Aira-gawa River, upper end of tidal region, Iriomote Island, Japan. Holotype: OMNH-P 20480. Paratypes: many at NTOU, OMNH. Plus non-type specimens. •Valid as Luciogobius ryukyuensis Chen, Suzuki & Senou 2008 -- (Kanagawa et al. 2011:67 [ref. 31329], Ikeda et al. 2019:571 [ref. 36910], Parenti 2021:293 [ref. 38603], Wada et al. 2021:48 [ref. 38521], Chen et al. 2024:195 [ref. 41743]). Current status: Valid as Luciogobius ryukyuensis Chen, Suzuki & Senou 2008. Oxudercidae: Gobionellinae. Distribution: Northwestern Pacific: Ryukyu Islands north to Amami Islands (southern Japan). Habitat: freshwater, brackish.