cavifrons, Gobius Weber [M.] 1909:152 [Notes from the Leyden Museum v. 31 (note 4); ref. 4600] Sula Takomi, Ternate, Molucca Islands, Indonesia. Lectotype: ZMA 112616. Paralectotypes: ZMA 123468 [ex 112616] (38). Type catalog: Nijssen et al. 1982:98 [ref. 19236]. Lectotype selected by Larson 2001:108 [ref. 25522]. •Valid as Mugilogobius cavifrons (Weber 1909) -- (Akihito in Masuda et al. 1984:268 [ref. 6441], Larson in Randall & Lim 2000:638 [ref. 25122], Larson 2001:102 [ref. 25522], Larson & Murdy 2001:3601 [ref. 26293], Myers & Donaldson 2003:642 [ref. 27495], Larson & Pidgeon 2004:197 [ref. 28107], Greenfield & Randall 2004:529 [ref. 28175], Mundy 2005:477 [ref. 28379], Randall 2007:406 [ref. 30952], Ho & Shao 2011: 57 [ref. 31432], Kottelat 2013:413 [ref. 32989], Huang et al. 2016:14 [ref. 34500], Koeda et al. 2016:93 [ref. 35333], Parenti 2021:328 [ref. 38603], Taki et al. 2021:452 [ref. 39830]). Current status: Valid as Mugilogobius cavifrons (Weber 1909). Oxudercidae: Gobionellinae. Distribution: Western Pacific: Indonesia east to Vietnam and Kosrae (Micronesia), north to southern Japan, south to Papua New Guinea. Introduced to Hawaiian Islands (U.S.A.). Habitat: freshwater, brackish, marine.