Hexanchus Rafinesque [C. S.] 1810:14 Masc. Squalus griseus Bonnaterre 1788. Type by monotypy. Hexancus Agassiz 1846:181 [ref. 64] is an unjustified emendation; spelled Hexanchias by Swainson 1838:148 [ref. 4302]. •Valid as Hexanchus Rafinesque 1810 -- (Boeseman 1973:8 [ref. 7161], Boeseman in Whitehead et al. 1984:73 [ref. 13675], Compagno 1984:19 [ref. 6474], Nakaya & Shirai in Masuda et al. 1984:3 [ref. 6441], Bass et al. 1986:46 [ref. 5638], Cappetta 1987:46 [ref. 6348], Paxton et al. 1989:27 [ref. 12442], Taniuchi & Tachikawa 1991 [ref. 20094], Gomon et al. 1994:87 [ref. 22532], Herman et al. 1994:151 [ref. 27820], Compagno 1999:472 [ref. 25589], Mecklenburg et al. 2002:82 [ref. 25968], Compagno 2003:375 [ref. 26984], Compagno et al. 2005:48 [ref. 29145], Hoese & Gates 2006:135 [ref. 28997], White 2008:77 [ref. 30617], Lipej & Dulčić 2010:5 [ref. 36649], Castro 2011:27 [ref. 31457], Ebert et al. 2013:20 [ref. 33032], Stewart 2015:117 [ref. 34217], Dyldin 2015:42 [ref. 34524], Pietsch & Orr 2015:15 [ref. 34694], Bañón et al. 2016:297 [ref. 34397], Del Moral-Flores et al. 2016:55 [ref. 34398], White et al. 2017:34 [ref. 35860], Daly-Engel et al. 2018:1 [ref. 35806], Ehemann et al. 2018:23 [ref. 36194], Fricke et al. 2018:18 [ref. 35805], Kumar et al. 2018:291 [ref. 36178], White & Ko'ou 2018:11 [ref. 35922], White et al. 2018:34 [ref. 35860], Ebert et al. 2021:18 [ref. 38234]). Current status: Valid as Hexanchus Rafinesque 1810. Hexanchidae.