discus, Acestridium Haseman [J. D.] 1911:319, Pls. 50 (fig. 1), 51 [Annals of the Carnegie Museum v. 7 (nos 3-4) (17); ref. 2047] Igarapé de Cachoeira Grande, near Manaus, Amazonas State, Brazil. Holotype: FMNH 54339 [ex CM 2985]. Paratypes: FMNH 54340 (1), UMMZ 138203 [ex CM 2986] (1). Type catalog: Henn 1928:83 [ref. 12305], Ibarra & Stewart 1987:4 [ref. 12367], Ferraris 2007:218 [ref. 29155]. •Valid as Acestridium discus Haseman 1911 -- (Isbrücker 1980:102 [ref. 2303], Burgess 1989:441 [ref. 12860], Retzer et al. 1999:315 [ref. 24231], Isbrücker 2001:25 [ref. 25653], Isbrücker 2002:11 [ref. 27178], Schaefer in Reis et al. 2003:321 [ref. 27061], Retzer 2005:4 [ref. 28228], Ferraris 2007:218 [ref. 29155], Rodriguez & Reis 2007:429 [ref. 29464], Chiachio et al. 2008:610 [ref. 30127], Reis & Lehmann A. 2009:451 [ref. 30379], Rodriguez et al. 2015:325 [ref. 33908], Delapieve et al. 2018:21 [ref. 35713]). Current status: Valid as Acestridium discus Haseman 1911. Loricariidae: Hypoptopomatinae. Distribution: Lower Negro River basin, Brazil. Habitat: freshwater.