leucostictus, Chaetostomus Günther [A.] 1864:248 [Catalogue of the fishes in the British Museum v. 5; ref. 1974] Essequibo River, Guyana. Holotype (unique): BMNH 1864.1.21.85. Type catalog: Ferraris 2007:222 [ref. 29155]. Original genus is correctly Chaetostoma. •Valid as Ancistrus leucostictus (Günther 1864) -- (Isbrücker 1980:69 [ref. 2303], Ortega & Vari 1986:16 [ref. 9708], Burgess 1989:437 [ref. 12860], Knaack 1999:152 [ref. 23874], Le Bail et al. 2000:228 [ref. 24549] as cf. leucostictus, Isbrücker 2001:25, 26 [ref. 25653], Isbrücker 2002:12 [ref. 27178], Fisch-Muller in Reis et al. 2003:376 [ref. 27061], Ferraris 2007:222 [ref. 29155], de Souza et al. 2019:24 [ref. 36504], Taphorn et al. 2022:50 [ref. 41297]). Current status: Valid as Ancistrus leucostictus (Günther 1864). Loricariidae: Hypostominae. Distribution: South America: middle and upper Essequibo River basin (Guyana), and probably Cuyuni River drainage (Venezuela). Habitat: freshwater.