concavifrons, Gobius Ramsay [E. P.] & Ogilby [J. D.] 1886:12 [Proceedings of the Linnean Society of New South Wales (Series 2) v. 1 (pt 1); ref. 14464] Strickland River, Papua New Guinea. Holotype (unique): AMS B.9950. Type catalog: Koumans 1940:163 [ref. 2676]. •Valid as Glossogobius concavifrons (Ramsay & Ogilby 1886) -- (Allen 1991:181 [ref. 21090], Allen et al. 2000:122 [ref. 27467] dated 1887, Unmack 2001:1064 [ref. 25797], Allen et al. 2002:267 [ref. 25930], Hoese & Larson 2006:1653 [ref. 29097], Allen et al. 2008:167 [ref. 30265], Hoese & Allen 2009:2 [ref. 29998], Hoese & Allen 2012:269 [ref. 31974], Larson et al. 2013:198 [ref. 32988], Hoese & Allen 2015:214 [ref. 33880], Pusey et al. 2017:73 [ref. 35250], Hoese & Hammer 2021:111 [ref. 38350], Parenti 2021:162 [ref. 38603]). Current status: Valid as Glossogobius concavifrons (Ramsay & Ogilby 1886). Gobiidae: Gobiinae. Distribution: Australia and New Guinea. Habitat: freshwater, brackish.