Pentanchus Smith [H. M.] & Radcliffe [L.] in Smith 1912:490 Masc. Pentanchus profundicolus Smith & Radcliffe 1912. Type by original designation (also monotypic). •Valid as Pentanchus Smith & Radcliffe 1912 -- (Nakaya 1975:7 [ref. 7083], Springer 1979:110 [ref. 4175], Compagno 1984:345 [ref. 6846] but as possible senior synonym of Apristurus Garman 1913, Compagno 1988:175 [ref. 13488], Compagno 1999:480 [ref. 25589], Nakaya & Séret 2000:373 [ref. 25115], Compagno et al. 2005:27 [ref. 29145], White et al. 2023:14 [ref. 40185]). Current status: Valid as Pentanchus Smith & Radcliffe 1912. Pentanchidae.