Species that contain: Hemiodus and unimaculatus [ 5 ] records

crenidens, Hemiodus Müller [J. W. von] 1842:324 [Archiv für Anatomie, Physiologie, und wissenschaftliche Medicin (J. Müller) v. 9 [1842]; ref. 19677] Brazil. Syntypes: ZMB 33926 (2). Also appeared in Müller 1842:206 [ref. 3062] and in Müller 1843:316 [ref. 3063]. •Synonym of Hemiodus unimaculatus (Bloch 1794) -- (Langeani in Reis et al. 2003:99 [ref. 27061], Langeani 2024:369 [ref. 40817]). Current status: Synonym of Hemiodus unimaculatus (Bloch 1794). Hemiodontidae. Habitat: freshwater.

kappleri, Hemiodus Günther [A.] 1868:479 [Annals and Magazine of Natural History (Series 4) v. 1 (no. 6) (art. 56); ref. 1992] Suriname. Lectotype: BMNH 1866.9.10.29. Paralectotype: BMNH 1866.9.10.30 (1). Also published in Günther (Sept.) 1868:244 [ref. 5756]. Lectotype selected by Langeani in Reis et al. 2003:99 [ref. 27061]. •Synonym of Hemiodus unimaculatus (Bloch 1794) -- (Langeani in Reis et al. 2003:99 [ref. 27061], Langeani 2024:369 [ref. 40817]). Current status: Synonym of Hemiodus unimaculatus (Bloch 1794). Hemiodontidae. Habitat: freshwater.

microcephalus, Hemiodus Günther [A.] 1864:298 [Catalogue of the fishes in the British Museum v. 5; ref. 1974] Rio Capin [= Capim], Pará State, Brazil. Lectotype: BMNH 1849.11.8.39. Paralectotype: BMNH 1849.11.8.40 (1). Lectotype selected by Langeani in Reis et al. 2003:99 [ref. 27061]. •Synonym of Hemiodus unimaculatus (Bloch 1794) -- (Langeani in Reis et al. 2003:99 [ref. 27061], Langeani 2024:369 [ref. 40817]). Current status: Synonym of Hemiodus unimaculatus (Bloch 1794). Hemiodontidae. Habitat: freshwater.

notatus, Anodus Jardine [W.] in Schomburgk 1841:218, Pl. 15 [The Natural history of fishes of Guiana; ref. 18707] Sandbank on the Rio Negro, South America. No types known. Provisionally placed in Anodus in original description. •Synonym of Hemiodus unimaculatus (Bloch 1794) -- (Langeani in Reis et al. 2003:99 [ref. 27061] with author as Schomburgk, Langeani 2024:369 [ref. 40817]). Current status: Synonym of Hemiodus unimaculatus (Bloch 1794). Hemiodontidae. Habitat: freshwater.

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], 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.