Family Hexanchidae Gray 1851

Name in prevailing recent practice, Article 35.5

Notidanini Bonaparte 1835:[3] [ref. 32242] (subfamily) Notidanus [genus inferred from the stem, Article 11.7.1.1; senior objective synonym of Hexanchina Gray 1851]

Hexanchina Gray 1851:67 [ref. 4939] (tribe) Hexanchus [junior objective synonym of Notidanini Bonaparte 1835, but Hexanchidae in prevailing recent practice; Hexanchidae used as valid by: Jordan 1923 [ref. 2421], Schultz with Stern 1948 [ref. 31938], Lindberg 1971 [ref. 27211], Nelson 1976 [ref. 32838], Shiino 1976, Lagler, Bardach, Miller & May Passino 1977, Nelson 1984 [ref. 13596], Whitehead et al. (1984) [ref. 13675], Smith & Heemstra 1986 [ref. 5715], Paxton et al. 1989 [ref. 12442], Springer 1990a [ref. 19315], Robins et al. 1991a [ref. 14237], Last & Stevens 1994 [ref. 23873], Nelson 1994 [ref. 26204], Eschmeyer 1998 [ref. 23416], Compagno 1999 [ref. 25589], Chu & Meng 2001, Menezes et al. 2003 [ref. 27192], Nelson et al. 2004 [ref. 27807], Hoese et al. 2006, Nelson 2006 [ref. 32486], Last & Stevens 2009, Ebert, White & Ho 2013 [ref. 33032]]

Hexeptranchidae Garman 1913:11, 15 [ref. 1545] (family)? [no stem of the type genus, not available, Article 11.7.1.1]

Heptranchidae Barnard 1925:20 [ref. 192] (family) Heptranchias [stem corrected to Heptranchi- by McCulloch 1929 –30:3 [ref. 2948], confirmed by Fowler 1936a:25 [ref. 6545], by Fowler 1947:8 [ref. 1458] and by Nelson 2006:65 [ref. 32486]; family name sometimes seen as Heptanchidae]

Notorynchidae Ellis 1989:46 [ref. 32830] (family) Notorynchus [name only, published after 1960, not available, Article 13.1.1]

Notorynchidae Shirai in Stiassny, Parenti & Johnson 1996:26, 33 [ref. 23450] (family) Notorynchus