brevispinis, Tridentiger obscurus Katsuyama [I.], Arai [R.] & Nakamura [M.] 1972:600, Pl. 2 (figs. 1-4) [Bulletin of the National Science Museum (Tokyo) v. 15 (no. 4); ref. 7620] Minato River, Chiba Prefecture, Japan. Holotype: NSMT-P 14549. Paratypes: NSMT-P 14400 (2), 14407 (2), 14411 (2), 14423 (4), 14438 (1), 14445 (12), 14449 (3), 14495 (11), 14548 (4), 14550-54 (1, 2, 19, 26, 2), 14558 (3). •Synonym of Tridentiger kuroiwae Jordan & Tanaka 1927, but a valid subspecies as described -- (Kawanabe & Mizuno 1989:606 [ref. 25598], Mashiko & Yamane 1993:363 [ref. 22459], Pietsch et al. 2001:146 [ref. 25688], Bogutskaya et al. 2001:47 [ref. 26178], Kim & Park 2002:384 [ref. 25913]). •Synonym of Tridentiger obscurus (Temminck & Schlegel 1845), but a valid subspecies as described -- (Reshetnikov et al. 1997:757 [ref. 24702], Vasil'eva 1998:147 [ref. 23591]). •Valid as Tridentiger brevispinis Katsuyama, Arai & Nakamura 1972 -- (Akihito in Masuda et al. 1984:271 [ref. 6441], Takahashi 1996:2 [ref. 24363], Kim 1997:459 [ref. 24032], Takahashi et al. 1997:49 [ref. 24971], Sato et al. 1998:43 [ref. 24972], Nakabo 2000:1257 [ref. 25182], Matsuura et al. 2000:242 [ref. 26000], Nakabo 2002:1257 [ref. 26193], Choi et al. 2003:400, 666 [ref. 26218], Yonezawa & Shinomiya 2002:2 [ref. 26563], Hagiwara 2003:40 [ref. 27188], Vasil'eva 2003:S53 [ref. 28444], Bogutskaya & Naseka 2004:236 [ref. 28183], Shedko & Chereshnev 2005:453 [ref. 30089], Matsui et al. 2014:7 [ref. 33344], Parin et al. 2014:505 [ref. 33547], Dyldin & Orlov 2017:193 [ref. 35257], Kim et al. 2020:175 [ref. 39118], Dyldin et al. 2021:37 [ref. 38804], Parenti 2021:376 [ref. 38603]). Current status: Valid as Tridentiger brevispinis Katsuyama, Arai & Nakamura 1972. Oxudercidae: Gobionellinae. Distribution: Northwestern Pacific: Japan, Korea and Russia. Habitat: freshwater, brackish, marine.