Opisthoproctus Vaillant [L. L.] 1888:105 Masc. Opisthoproctus soleatus Vaillant 1888. Type by monotypy. •Valid as Opisthoproctus Vaillant 1888 -- (Cohen 1973:156 [ref. 6589], Cohen in Whitehead et al. 1984:396 [ref. 13675], Ahlstrom et al. 1984:156 [ref. 13627], Heemstra 1986:217 [ref. 5660], Paxton et al. 1989:170 [ref. 12442], Gomon et al. 1994:241 [ref. 22532], Paxton & Cohen 1999:1887 [ref. 24738], Carter & Hartel 2003:872 [ref. 27000], Paxton et al. 2006:371 [ref. 28996], Gomon 2008:198 [ref. 30616], Stewart 2015:328 [ref. 34215]). Current status: Valid as Opisthoproctus Vaillant 1888. Opisthoproctidae.