Gymnachirus Kaup [J. J.] 1858:101 Masc. Gymnachirus nudus Kaup 1858. Type by monotypy. •Valid as Gymnachirus Kaup 1858 -- (Dawson 1964 [ref. 20936], Matsuura in Uyeno et al. 1983:462 [ref. 14275], Chapleau & Keast 1988:2799 [ref. 12625], Castro-Aguirre et al. 1999:496 [ref. 24550], Munroe 2003:1926 [ref. 27118]). Current status: Valid as Gymnachirus Kaup 1858. Achiridae.