Gnathagnus Gill [T. N.] 1861:115 Masc. Uranoscopus elongatus Temminck & Schlegel 1843. Type by monotypy. See Manilo 1998:114 [ref. 25310]. •Valid as Gnathagnus Gill 1861 -- (Mees 1960:47 [ref. 11931], Kishimoto in Masuda et al. 1984:293 [ref. 6441], Pietsch 1989:294 [ref. 12541], Kishimoto 1989 [ref. 13562], Gomon et al. 1994:719 [ref. 22532], Carpenter 2003:1747 [ref. 27092], Berry & Anderson 1961:580 [ref. 37362]). •Synonym of Xenocephalus Kaup 1858 -- (Springer & Bauchot 1994:79 [ref. 21269] and based on current status of the type species of Gnathagnus, Vilasri 2013:90 [ref. 33304]). Current status: Synonym of Xenocephalus Kaup 1858. Uranoscopidae.