unicolor, Spinax Engelhardt [R.] 1912:645 [Zoologischer Anzeiger v. 39 (nos 21/22); ref. 17459] Sagami Bay, Honshu, Japan. Holotype (unique): ZSM [old collection] destroyed in WWII. Type catalog: Neumann 2006:275 [ref. 28925]. •Valid as Etmopterus unicolor (Engelhardt 1912) -- (Shirai in Amaoka et al. 1983:49, 165 [ref. 8379], Compagno 1984:86 [ref. 6474], Nakaya & Shirai in Masuda et al. 1984:9 [ref. 6441], Yano 1997:62 [ref. 22728], Compagno & Niem 1998:1222 [ref. 23787], Compagno 1999:473 [ref. 25589], Nakabo 2000:145 [ref. 25086], Nakabo 2002:145 [ref. 26001], Last et al. 2002:203 [ref. 26556], Schaaf-Da Silva & Ebert 2006:62 [ref. 28880], White 2008:89 [ref. 30617], Straube et al. 2011:138 [ref. 31563], Straube et al. 2011:62 [ref. 31679], Naylor et al. 2012:64 [ref. 32267] see remarks, Vásquez et al. 2015:53 [ref. 34111], Last & Stewart 2015:146 [ref. 34224], Weigmann 2016:62 [ref. 34211], Almeida & Biscoito 2019:104 [ref. 37302]). Current status: Valid as Etmopterus unicolor (Engelhardt 1912). Etmopteridae. Distribution: Southeastern Atlantic, southwestern Indian Ocean: Namibia and South Africa; southeastern Indian Ocean, western Pacific: Japan; southern Australia and New Zealand region. Habitat: marine.