obscurus, Centroscymnus Vaillant [L. L.] 1888:67, Pl. 2 (figs. 2, 2a-2e) [Expéditions scientifiques du "Travailleur" et du "Talisman"; ref. 4496] Off Sudan, Red Sea, depth 1400-1435 meters. Holotype (unique): MNHN 1884-0388. Partial type: MCZ 89836 (skin section from holotype) Type catalog: Bertin 1939:75 [ref. 20739]. •Valid as Centroscymnus obscurus Vaillant 1888 -- (Bass et al. 1986:53 [ref. 5636]). •Valid as Scymnodon obscurus (Vaillant 1888) -- (Krefft & Tortonese 1973:45 [ref. 7165], Nakaya in Okamura et al. 1982:47, 311 [ref. 8256], Uyeno & Sasaki in Uyeno et al. 1983:66 [ref. 14275], McEachran & Branstetter in Whitehead et al. 1984:142 [ref. 13675], Compagno 1984:98 [ref. 6474], Nakaya & Shirai in Masuda et al. 1984:11 [ref. 6441], Gubanov & Timoxin 1989:225 [ref. 36138], Springer 1990:16 [ref. 19315], Cervigón 1992:189 [ref. 23827], Wetherbee & Crow 1996:334 [ref. 22434]). •Synonym of Scymnodon squamulosus (Günther 1877) -- (McEachran & Fechhelm 1998:122 [ref. 23897], Kiraly et al. 2003:7 [ref. 28226], Espinosa Pérez et al. 2004:100 [ref. 27705]). •Synonym of Zameus squamulosus (Günther 1877) -- (Compagno 2003:407 [ref. 26984], Castro 2011:122 [ref. 31457], Akhilesh et al. 2013:127 [ref. 33120], Del Moral-Flores et al. 2016:63 [ref. 34398], Weigmann 2016:65 [ref. 34211], Compagno 2016:1199 [ref. 34544], Biscoito et al. 2018:475 [ref. 37562], Ebert et al. 2021:33 [ref. 38234], Kemper & Ebert 2022:441 [ref. 39661]). Current status: Synonym of Zameus squamulosus (Günther 1877). Somniosidae. Habitat: marine.