canescens, Scyllium Günther [A.] 1878:18 [2] [Annals and Magazine of Natural History (Series 5) v. 2 (nos 7/8/9)(art. 2/22/28); ref. 2010] Southwestern coast of South America, Challenger station 310, depth 400 fathoms. Holotype (unique): BMNH 1887.12.7.1. On p. 2 of separate. Also appeared in Günther 1887:1, Pl. 1 (fig. A) [ref. 2013]. •Valid as Halaelurus canescens (Günther 1878) -- (Compagno 1984:323 [ref. 6846], Gubanov & Timoxin 1989:222 [ref. 36138], Pequeño 1989:13 [ref. 14125], Shcherbachev et al. 1989:164 [ref. 36134], Chirichigno F. & Vélez D. 1998:36 [ref. 24555], Compagno 1999:479 [ref. 25589]). •Valid as Bythaelurus canescens (Günther 1878) -- (White et al. 2007:1 [ref. 29295], Last & Stevens 2008:123 [ref. 29681], McCosker et al. 2012:58 [ref. 31823], Ebert & Clerkin 2015:54 [ref. 33848], Weigmann 2016:35 [ref. 34211], Weigmann et al. 2016:428 [ref. 34984], Weigmann & Kaschner 2017:116 [ref. 35311], Weigmann et al. 2018:36 [ref. 36365]). Current status: Valid as Bythaelurus canescens (Günther 1878). Pentanchidae. Distribution: Southeastern Pacific: Peru and Chile to Straits of Magellan. Habitat: marine.