cinereus, Squalus Gmelin [J. F.] 1789:1497 [Caroli a Linné ... Systema Naturae per regna tria naturae v. 1 (pt 3); ref. 18139] Mediterranean Sea. No types known. •Synonym of Heptranchias perlo (Bonnaterre 1788) -- (Boeseman 1973:9 [ref. 7161], Boeseman in Whitehead et al. 1984:72 [ref. 13675], Compagno 1984:17 [ref. 6474], Springer 1990:4 [ref. 19315], Bilecenoğlu et al. 2002:8 [ref. 26753], Hoese & Gates 2006:135 [ref. 28997], Dyldin 2015:42 [ref. 34524], Ebert et al. 2021:18 [ref. 38234]). Current status: Synonym of Heptranchias perlo (Bonnaterre 1788). Hexanchidae. Habitat: marine.