schomburgkii, Chaetostomus Günther [A.] 1864:245 [Catalogue of the fishes in the British Museum v. 5; ref. 1974] Guyana. Syntypes: BMNH 1845.3.5.26-27 (2). Type catalog: Ferraris 2007:265 [ref. 29155]. Original genus is correctly Chaetostoma. •Valid as Guyanancistrus schomburgkii (Günther 1864) -- (Isbrücker et al. 2001:19 [ref. 25649], Isbrücker 2001:26, 27 [ref. 25653], Isbrücker 2002:16 [ref. 27178], Fisch-Muller in Reis et al. 2003:385 [ref. 27061]). •Valid as Pseudancistrus schomburgkii (Günther 1864) -- (Armbruster 2004:5 [ref. 27844], DoNascimiento 2016:533 [ref. 34727]). •Valid as Lasiancistrus schomburgkii (Günther 1864) -- (Isbrücker 1980:46 [ref. 2303], Burgess 1989:434 [ref. 12860], Knaack 2000:58 [ref. 27233], Armbruster 2005:561 [ref. 28554], Ferraris 2007:265 [ref. 29155], DoNascimiento et al. 2017:83 [ref. 35633], Meza-Vargas et al. 2021:26 [ref. 39298]). Current status: Valid as Lasiancistrus schomburgkii (Günther 1864). Loricariidae: Hypostominae. Distribution: South America: Amazon River basin, and upper Orinoco River and Essequibo River basins (Brazil, Colombia, Ecuador, Guyana, Peru and Venezuela). Habitat: freshwater.