longicephalus, Apristurus Nakaya [K.] 1975:32, Figs. 15-16 [Memoirs of the Faculty of Fisheries Hokkaido University v. 23 (no. 1); ref. 7083] Sea of Japan, Tosa Bay, 33°13'N, 133°44'E, Kochi Prefecture, Japan. Holotype (unique): HUMZ 42399. •Valid as Apristurus longicephalus Nakaya 1975 -- (Compagno 1984:271 [ref. 6846], Nakaya in Masuda et al. 1984:4 [ref. 6441], Nakaya in Okamura & Kitajima 1984:43, 296 [ref. 8057], Ivanov 1986:147 [ref. 19451], Nakaya 1988:134 [ref. 6855], Nakaya 1988 [ref. 6696], Nakaya 1991:999 [ref. 19774], Last & Stevens 1994:180 [ref. 23873], Compagno & Niem 1998:1286 [ref. 23787], Nakaya & Sato 1999:315 [ref. 23941], Nakaya & Séret 1999:307 [ref. 24247], Compagno 1999:478 [ref. 25589], Nakabo 2000:130 [ref. 25086], Hutchins 2001:14 [ref. 25847], Shinohara et al. 2001:287 [ref. 25995], Nakabo 2002:130 [ref. 26001], Shinohara et al. 2005:392 [ref. 28370], Hoese et al. 2006:82 [ref. 28999], Sato et al. 2008:118 [ref. 29680], Iglésias 2012:511 [ref. 32534], Sato et al. 2013:759 [ref. 32718], Nakaya & Kawauchi 2013:131, 138 [ref. 33037], Ebert et al. 2013:314 [ref. 33045], Kawauchi et al. 2014:9 [ref. 33554], Weigmann 2016:32 [ref. 34211], White et al. 2017:25 [ref. 35594], Soares & Carvalho 2020:379 [ref. 37593], Cordova & Ebert 2021:23 [ref. 38414]). Current status: Valid as Apristurus longicephalus Nakaya 1975. Pentanchidae. Distribution: Indo-West Pacific. Habitat: marine.