microstomus, Hemidoras Eigenmann [C. H.] 1912:193, Pl. 18 (fig. 2) [Memoirs of the Carnegie Museum v. 5 (no. 1); ref. 1227] Essequibo River at Rockstone, Guyana. Holotype: FMNH 118302 [ex FMNH 53207, ex CM 1650]. Paratypes: (11) CAS-SU 21782 (1), CAS 76793 (3), CAS 76792 [ex IU 12039] (1), BMNH 1911.10.31.94 (1); FMNH 7398 (1), 53207 (1); MCZ 30069 (1); USNM 66200 [ex CM 1651] (1). Type catalog: Böhlke 1953:42 [ref. 12291], Henn 1928:74 [ref. 12305], Ibarra & Stewart 1987:44 [ref. 12367], Ferraris & Vari 1992:17 [ref. 19771], Ferraris 2007:179 [ref. 29155]. Appeared first as name only in Eigenmann 1910:394 [ref. 1224]. •Valid as Anduzedoras microstomus (Eigenmann 1912) -- (Burgess 1989:223 [ref. 12860]). •Valid as Trachydoras microstomus (Eigenmann 1912) -- (Sabaj & Ferraris in Reis et al. 2003:466 [ref. 27061], Ferraris 2007:179 [ref. 29155], Birindelli 2014:538 [ref. 33501], Sarmiento et al. 2014:191 [ref. 35004], Sabaj & Arce H. 2017:18 [ref. 35518], DoNascimiento et al. 2017:89 [ref. 35633], Lasso et al. in Lasso & Morales-Betancourt 2022:172 [ref. 40783]). Current status: Valid as Trachydoras microstomus (Eigenmann 1912). Doradidae: Doradinae. Distribution: South America: Amazon, Orinoco and Essequibo River basins (Bolivia, Brazil, Colombia, Guyana, Peru and Venezuela). Habitat: freshwater.