unimaculatus, Salmo Bloch [M. E.] 1794:105, Pl. 381 (fig. 3) [Naturgeschichte der ausländischen Fische v. 8; ref. 463] Brazil; Suriname. Syntypes: ZMB 3535 (2) America. Type catalog: Paepke 1999:86, and errata on inside of back cover [ref. 24282]. On p. 85 of Bloch's Ichthyologie, v. 11 [ref. 21381]. •Valid as Hemiodus unimaculatus (Bloch 1794) -- (Planquette et al. 1996:102 [ref. 22818], Lasso et al. 2001:96 [ref. 25928], Langeani in Reis et al. 2003:99 [ref. 27061], Barriga Salazar 2014:106 [ref. 35745], Sarmiento et al. 2014:186 [ref. 35004], DoNascimiento et al. 2017:39 [ref. 35633], Nogueira et al. 2019:803 [ref. 36655], Nogueira et al. 2020:[5] [ref. 38050], Silva et al. 2020:179 [ref. 37389], Silvano et al. 2020:138 [ref. 38133], Meza-Vargas et al. 2021:15 [ref. 39298], Koerber et al. 2022:21 [ref. 39235], Taphorn et al. 2022:25 [ref. 41297], Cortés Hernández et al. 2023:456 [ref. 40760], Langeani 2024:369 [ref. 40817]). Current status: Valid as Hemiodus unimaculatus (Bloch 1794). Hemiodontidae. Distribution: South America: Brazil, Ecuador, Colombia, Bolivia, French Guiana, Guyana, Peru and Suriname. Habitat: freshwater.