Richardsonichthys Smith [J. L. B.] 1958:169 Masc. Apistes leucogaster Richardson 1848. Type by original designation (also monotypic). •Valid as Richardsonichthys Smith 1958 -- (Washington et al. 1984:440 [ref. 13660], Paxton et al. 1989:447 [ref. 12442], Poss 1999:2298 [ref. 24796], Mandrytsa 2001:263 [ref. 25636], Allen et al. 2006:902 [ref. 29078], Prokofiev 2008:304 [ref. 29592], Motomura 2009:70 [ref. 30463], Chungthanawong & Motomura 2021:[4] [ref. 38168]). Current status: Valid as Richardsonichthys Smith 1958. Synanceiidae: Tetraroginae.