kuroiwae, Tridentiger Jordan [D. S.] & Tanaka [S.] 1927:276, Pl. 23 (figs. 1-3) [Annals of the Carnegie Museum v. 17 (no. 2); ref. 15796] Yakkachi River, Amami-Oshima Island, Ryukyu Islands, Japan. Holotype: FMNH 59181 [ex CM 8324]. Paratypes: (9) FMNH 59182 [ex CM 8325] (9), ?CAS-SU 23668 (5). Type catalog: Henn 1928:97 [ref. 12305], Böhlke 1953:118 [ref. 12291], Ibarra & Stewart 1987:84 [ref. 12367]. •Valid as Tridentiger kuroiwae Jordan & Tanaka 1927, subspecies kuroiwae -- (Kawanabe & Mizuno 1989:608 [ref. 25598]). •Synonym of Tridentiger obscurus (Temminck & Schlegel 1845) -- (Okada 1961:655 [ref. 6363], Vasil'eva 1998:147 [ref. 23591]). •Valid as Tridentiger kuroiwae Jordan & Tanaka 1927 -- (Akihito in Masuda et al. 1984:272 [ref. 6441], Nakabo 2000:1258 [ref. 25182], Sakai et al. 2001:120 [ref. 25693], Nakabo 2002:1258 [ref. 26193], Yonezawa & Shinomiya 2002:2 [ref. 26563], Yonezawa et al. 2010:260 [ref. 30902], Motomura et al. 2010:220 [ref. 31256], Cui et al. 2013:177 [ref. 32726], Parenti 2021:376 [ref. 38603]). Current status: Valid as Tridentiger kuroiwae Jordan & Tanaka 1927. Oxudercidae: Gobionellinae. Distribution: East Asia: Ryukyu islands (Japan). Habitat: freshwater.