squalinum, Hypostoma Jardine [W.] in Schomburgk 1841:142, Pls. 2-3 [The Natural history of fishes of Guiana; ref. 18707] Rio Branco, Rio Negro, and Essequibo River, South America. Holotype (unique): whereabouts unknown. Type catalog: Ferraris 2007:298 [ref. 29155]. •Valid as Hypostomus squalinus Jardine & Schomburgk 1841 -- (Isbrücker 1980:34 [ref. 2303], Burgess 1989:432 [ref. 12860], Armbruster 2004:80 [ref. 27644] with author as Schomburgk). •Valid as Squaliforma squalina (Jardine & Schomburgk 1841) -- (Isbrücker et al. 2001:22 [ref. 25649], Isbrücker 2001:28, 32 [ref. 25653], Isbrücker 2002:29 [ref. 27178], Weber in Reis et al. 2003:367 [ref. 27061], Ferraris 2007:298 [ref. 29155] with author correctly as Jardine, Weber et al. 2012:219 [ref. 31999], DoNascimiento 2016:533 [ref. 34727]). •Synonym of Aphanotorulus emarginatus (Valenciennes 1840) -- (Ray & Armbruster 2016:512 [ref. 34178], see DoNascimiento et al. 2017:[19] [ref. 35679]). Current status: Synonym of Aphanotorulus emarginatus (Valenciennes 1840). Loricariidae: Hypostominae. Habitat: freshwater.