villosus, Lithogenes Eigenmann [C. H.] 1909:6 [Annals of the Carnegie Museum v. 6 (no. 1); ref. 1222] Upper Potaro River at Aruataima Falls, Guyana. Holotype (unique): FMNH 52960 [ex CM 1002]. Type catalog: Henn 1928:84 [ref. 12305], Ibarra & Stewart 1987:53 [ref. 12367], Ferraris 2007:267 [ref. 29155]. •Valid as Lithogenes villosus Eigenmann 1909 -- (Isbrücker 1980:6 [ref. 2303], Burgess 1989:429 [ref. 12860], de Pinna 1998:303 [ref. 23847], Montoya-Burgos et al. 1998:367 [ref. 23850], Reis & Pereira 1999:45 [ref. 23669], Procenzano et al. 2003:562 [ref. 27128], Reis et al. 2003:318 [ref. 27061], Ferraris 2007:267 [ref. 29155], Schaefer & Provenzano 2008:7 [ref. 30039], Reis et al. 2016:15 [ref. 34496], Taphorn et al. 2022:52 [ref. 41297]). Current status: Valid as Lithogenes villosus Eigenmann 1909. Loricariidae: Lithogeninae. Distribution: South America: Essequibo River basin, Potaro River (Guyana) endemic. Habitat: freshwater.