Species that contain: Tridentiger and obscurus [ 7 ] records

atriceps, Gobius (Ctenogobius) Regan [C. T.] 1905:364 [Annals and Magazine of Natural History (Series 7) v. 16 (no. 93) (art. 42); ref. 15382] Inland Sea, Japan. Holotype (unique): BMNH 1905.6.7.34. •Synonym of Tridentiger obscurus (Temminck & Schlegel 1845) -- (Okada 1961:655 [ref. 6363] as articeps). Current status: Synonym of Tridentiger obscurus (Temminck & Schlegel 1845). Oxudercidae: Gobionellinae. Habitat: freshwater, brackish, marine.

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]). Current status: Valid as Tridentiger brevispinis Katsuyama, Arai & Nakamura 1972. Oxudercidae: Gobionellinae. Distribution: Northwestern Pacific: Japan, Korea and Russia. Habitat: freshwater, brackish, marine.

coreanus, Tridentiger Regan [C. T.] 1908:63, Pl. 3 (fig. 2) [Proceedings of the Zoological Society of London 1908 (pt 1) (art. 3) (for 4 Feb. 1908); ref. 14334] Chong-ju, Kin River, South Korea. Holotype (unique): BMNH 1907.12.30.34-41 (1 of 8). Additional material: BMNH 1907.12.30.34-41 (7 of 8). •Synonym of Tridentiger obscurus (Temminck & Schlegel 1845) -- (Berg 1949:1103 [ref. 20662], Vasil'eva 1998:147 [ref. 23591]). Current status: Synonym of Tridentiger obscurus (Temminck & Schlegel 1845). Oxudercidae: Gobionellinae. Habitat: freshwater, brackish, marine.

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]). Current status: Valid as Tridentiger kuroiwae Jordan & Tanaka 1927. Oxudercidae: Gobionellinae. Distribution: Western North Pacific. Habitat: freshwater.

nudicervicus, Tridentiger Tomiyama [I.] 1934:328, Fig. 2 [Journal of the Faculty of Science, University of Tokyo Section IV Zoology v. 3 (pt 3); ref. 15749] Ariake Sound, western Kyushu, Japan. Holotype: ZUMT 26304. Paratypes: (3) ZUMT 26330 (1), 30193-94 (2). Species originally described as above as Tridentiger nudicervicus, later changed to Tridentiger obscurus nudicervicus by Tomiyama 1936:96, Fig. 40 [ref. 4413]. •Valid as Tridentiger nudicervicus Tomiyama 1934 -- (Akihito in Masuda et al. 1984:272 [ref. 6441], Chen et al. 1996:4 [ref. 22533], Yokogawa 1996:2 [ref. 24366], Kim 1997:456 [ref. 24032], Nakabo 2000:1257 [ref. 25182], Kim & Park 2002:380 [ref. 25913], Nakabo 2002:1257 [ref. 26193], Choi et al. 2003:400, 666 [ref. 26218], Cui et al. 2013:188 [ref. 32726]). •Valid as Tomiyamia nudicervica (Tomiyama 1934) -- (Endruweit 2024:85 [ref. 41040]). Current status: Valid as Tomiyamia nudicervica (Tomiyama 1934). Oxudercidae: Gobionellinae. Distribution: Western Pacific: Japan and Fangchenggang Prefecture, Guangxi, China. Habitat: brackish.

obscurum, Sicydium Temminck [C. J.] & Schlegel [H.] 1845:145, Pl. 76 (fig. 1) [Fauna Japonica Parts 7-9; ref. 4373] Nagasaki, Japan. Lectotype: RMNH 1746. Paralectotypes: RMNH D985 (1, dry), 1738 (2). Lectotype selected by Boeseman 1947:126 [ref. 12876]. •Valid as Tridentiger obscurus (Temminck & Schlegel 1845) -- (Berg 1949:1102 [ref. 20662], Okada 1961:654 [ref. 6363], Lindberg & Krasyukova 1975:346 [ref. 7348], Akihito in Masuda et al. 1984:272 [ref. 6441], Kawanabe & Mizuno 1989:605 [ref. 25598], Cheng & Zhou 1997:366 [ref. 26385], Kim 1997:458 [ref. 24032], Takahashi et al. 1997:49 [ref. 24971], Reshetnikov et al. 1997:757 [ref. 24702], Vasil'eva 1998:147 [ref. 23591], Sokolovskaya et al. 1998:13 [ref. 24670], Sato et al. 1998:43 [ref. 24972], Mizuno et al. 1999:13 [ref. 25311], Larson in Randall & Lim 2000:640 [ref. 25122], Nakabo 2000:1258 [ref. 25182], Matsuura et al. 2000:243 [ref. 26000], Bogutskaya et al. 2001:47 [ref. 26178], Shimizu 2001:42 [ref. 25799], Wang et al. 2001:274 [ref. 26566], Kim & Park 2002:381 [ref. 25913], Nakabo 2002:1258 [ref. 26193], Choi et al. 2003:400, 666 [ref. 26218], Hagiwara 2003:40 [ref. 27188], Jang et al. 2003:120 [ref. 27681], Kim et al. 2004:56 [ref. 27747], Bogutskaya & Naseka 2004:236 [ref. 28183], Matsunuma et al. 2010:85 [ref. 31558], Cui et al. 2013:188 [ref. 32726], Matsui et al. 2014:8 [ref. 33344], Kwun et al. 2017:143 [ref. 37287], Kim et al. 2020:175 [ref. 39118], Sonoyama et al. 2020:108 [ref. 37637]). Current status: Valid as Tridentiger obscurus (Temminck & Schlegel 1845). Oxudercidae: Gobionellinae. Distribution: Northwestern Pacific: Korea and Japan. Habitat: freshwater, brackish, marine.

squamistrigatus, Triaenophorichthys Hilgendorf [F. M.] 1879:111 [Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin 1879; ref. 21467] Tokyo, Japan. Syntypes: ZMB 10647 (6). •Synonym of Tridentiger obscurus (Temminck & Schlegel 1845) -- (Okada 1961:655 [ref. 6363], Vasil'eva 1998:147 [ref. 23591]). Current status: Synonym of Tridentiger obscurus (Temminck & Schlegel 1845). Oxudercidae: Gobionellinae. Habitat: freshwater, brackish, marine.