macrognathos, Gobius Bleeker [P.] 1860:83, Pl. 1 (fig. 1) [not Pl. 2 as stated in text] [Acta Societatis Regiae Scientiarum Indo-Neêrlandicae v. 8 (art. 1); ref. 374] Tokyo, Japan. Holotype (unique): RMNH 4461. •Valid as Chaenogobius macrognathos (Bleeker 1860) -- (Suzuki & Masuda 1993:4 [ref. 24333]). •Valid as Chaenogobius macrognathus (Bleeker 1860) -- (Akihito in Masuda et al. 1984:278 [ref. 6441], Kawanabe & Mizuno 1989:623 [ref. 25598], Kim 1997:436 [ref. 24032], Reshetnikov et al. 1997:754 [ref. 24702], Vasil'eva 1998:133 [ref. 23591], Sokolovskaya et al. 1998:13 [ref. 24670], Kim & Park 2002:360 [ref. 25913], Choi et al. 2003:398, 658 [ref. 26218], Stevenson 2002:285 [ref. 26489]). •Valid as Gymnogobius macrognathos (Bleeker 1860) -- (Berg 1949:1073 [ref. 20662] as macrognathus, Lindberg & Krasyukova 1975:377 [ref. 7348] as macrognathus, Nakabo 2000:1199 [ref. 25182], Pietsch et al. 2001:146 [ref. 25688], Bogutskaya et al. 2001:47 [ref. 26178], Wang et al. 2001:269 [ref. 26566] as macrognathus, Nakabo 2002:1199 [ref. 26193], Harada et al. 2002:326 [ref. 26496], Vasil'eva 2003:S46 [ref. 28444], Bogutskaya & Naseka 2004:222 [ref. 28183], Zhao et al. 2007:454 [ref. 29515] as macrognatus, Parin et al. 2014:486 [ref. 33547], Dyldin & Orlov 2017:189 [ref. 35257] with question, Henmi et al. 2018:200 [ref. 36477], Dyldin et al. 2021:35 [ref. 38804] with question, Ito et al. 2021:[9] [ref. 38897], Parenti 2021:297 [ref. 38603]). Current status: Valid as Gymnogobius macrognathos (Bleeker 1860). Oxudercidae: Gobionellinae. Distribution: East Asia: Japan, Russia, Korea and China. Habitat: brackish.