cryptacanthus, Centroscymnus Regan [C. T.] 1906:437 [Annals and Magazine of Natural History (Series 7) v. 18 (no. 108) (art. 70); ref. 15711] Madeira, eastern Atlantic. Holotype (unique): BMNH 1865.5.20.14. •Valid as Centroscymnus cryptacanthus Regan 1906 -- (Krefft & Tortonese 1973:41 [ref. 7165], McEachran & Branstetter in Whitehead et al. 1984:136 [ref. 13675], Compagno 1984:57 [ref. 6474], Taniuchi & Garrick 1986:119 [ref. 5721], Springer 1990:16 [ref. 19315], Heemstra in Smith & Heemstra 1995:v [ref. 21953], Santos et al. 1997:12 [ref. 23531], McEachran & Fechhelm 1998:111 [ref. 23897], Compagno 1999:474 [ref. 25589], Soto 2001:27 [ref. 26635], Soto 2001:66, 92 [ref. 26637], Gadig & Gomes in Menezes et al. 2003:26 [ref. 27192], Nión et al. 2016:21 [ref. 35565]). •Synonym of Centroscymnus owstonii Garman 1906 -- (Compagno 2003:406 [ref. 26984], Kiraly et al. 2003:7 [ref. 28226], Hoese & Gates 2006:142 [ref. 28997], Del Moral-Flores et al. 2016:62 [ref. 34398] as owstoni, Weigmann 2016:63 [ref. 34211], Compagno 2016:1195 [ref. 34544], Biscoito et al. 2018:474 [ref. 37562], Kemper & Ebert 2022:438 [ref. 39661]). Current status: Synonym of Centroscymnus owstonii Garman 1906. Somniosidae. Habitat: marine.