irwini, Megalodoras Eigenmann [C. H.] 1925:307, Pls. 1, 3, 6, 25 (figs. 1-2) [Transactions of the American Philosophical Society (New Series) v. 22 (pt 5); ref. 1244] Kartabo, Bartica District, Guyana. Holotype: CAS 80234 [not 20735]. Paratypes: CAS 12037 [ex IU 16168] (2, now 1), 60227 [not 64227] [ex IU 15427] (orig. 5, now 2), 80243 [ex IU 15427] (1, labeled holotype); USNM 167837 [ex IU 15427] (1). Type catalog: Mead 1958:133 [ref. 20648], Ferraris & Vari 1992:17 [ref. 19771], Ferraris 2007:174 [ref. 29155]. Species account appears twice in paper; first based only on CAS 20735 (p. 307), second (pp. 308-309) based on IU material. •Valid as Megalodoras irwini Eigenmann 1925 -- (Ortega & Vari 1986:13 [ref. 9708], Burgess 1989:223 [ref. 12860], de Pinna 1998:307 [ref. 23847]). •Synonym of Megalodoras uranoscopus (Eigenmann & Eigenmann 1888) -- (Sabaj & Ferraris in Reis et al. 2003:462 [ref. 27061], Ferraris 2007:174 [ref. 29155]). Current status: Synonym of Megalodoras uranoscopus (Eigenmann & Eigenmann 1888). Doradidae: Doradinae. Habitat: freshwater.