heteracanthus, Chaetostomus Günther [A.] 1869:425, Figs. 3-4 [Proceedings of the Zoological Society of London 1869 (pt 2); ref. 5780] Upper Amazon River basin, Peru. Holotype (unique): BMNH 1869.5.21.3. Type catalog: Ferraris 2007:265 [ref. 29155]. Original genus is correctly Chaetostoma. •Valid as Lasiancistrus heteracanthus (Günther 1869) -- (Isbrücker 1980:44 [ref. 2303], Ortega & Vari 1986:17 [ref. 9708], Burgess 1989:434 [ref. 12860], Knaack 2000:58 [ref. 27233], Isbrücker 2001:26, 29 [ref. 25653], Isbrücker 2002:20 [ref. 27178], Fisch-Muller in Reis et al. 2003:387 [ref. 27061], Armbruster 2005:558 [ref. 28554], Ferraris 2007:265 [ref. 29155], Barriga Salazar 2014:113 [ref. 35745], see DoNascimiento et al. 2017:[20] [ref. 35679], Meza-Vargas et al. 2021:26 [ref. 39298]). Current status: Valid as Lasiancistrus heteracanthus (Günther 1869). Loricariidae: Hypostominae. Distribution: South America: Napo River, upper Amazon basin (Ecuador and Peru). Habitat: freshwater.