bifrenatus, Gobius Kner [R.] 1865:177, Pl. 7 (fig. 3) [Reise der öesterreichischen Fregatte "Novara" v. 1 (pt 2); ref. 18427] Sydney, New South Wales, Australia. Syntypes: NMW 20592 (1), 57208 (3). Also appeared in Kner 1865 (May 18):502, Pl. 7 (fig. 3) [ref. 4928], earliest not established. •Valid as Amoya bifrenatus (Kner 1865) -- (Larson & Hoese in McDowall 1996:226 [ref. 22909]). •Valid as Acentrogobius bifrenatus (Kner 1956 [sic]) -- (Larson & Murdy 2001:3594 [ref. 26293], Francis et al. 2003:105 [ref. 27058], Francis et al. 2004:678 [ref. 27965]). •Valid as Arenigobius bifrenatus (Kner 1865) -- (Cadwallader & Backhouse 1983:144 [ref. 25473], Kuiter 1993:359 [ref. 23929], Gomon et al. 1994:783 [ref. 22532], Willis et al. 1999:189 [ref. 24629], Hutchins 2001:42 [ref. 25847], Hoese & Larson 2006:1623 [ref. 29097], Hoese & Larson 2008:753 [ref. 30660], Larson 2011:237, 239 [ref. 31740], Hoese 2015:1576 [ref. 34304], Kuiter 2018:86 [ref. 36369], Parenti 2021:94 [ref. 38603]). Current status: Valid as Arenigobius bifrenatus (Kner 1865). Gobiidae: Gobiinae. Distribution: Southeastern Indian Ocean, southwestern Pacific: southern Queensland (Australia) to Western Australia; New Zealand (introduced). Habitat: brackish, marine.