rhomboidalis, Myletes Cuvier [G.] 1818:451, Pl. 22 (fig. 3) [Mémoires du Muséum d'Histoire Naturelle, Paris v. 4; ref. 1016] Brazil. Non-types: MNHN 0105 (1) Essequibo, 4423 (1) Amazon, A-9862 (2) Mana R., A-9739 (1) Essequibo; ZMB 3643 (1?) Essequibo. Type catalog: Bertin 1948:26 [ref. 19577]. •Valid as Myleus rhomboidalis (Cuvier 1818) -- (Ovchynnyk 1967:30 [ref. 37559], Géry 1972:183 [ref. 1594], Géry et al. 1991:37 [ref. 21021], Planquette et al. 1996:368 [ref. 22818], Jégu in Reis et al. 2003:186 [ref. 27061], DoNascimiento et al. 2017:37 [ref. 35633]). •Valid as Myloplus rhomboidalis (Cuvier 1818) -- (Andrade et al. 2016:154 [ref. 34307], Andrade et al. 2016:579 [ref. 34960], Andrade et al. 2018:121 [ref. 35868], Andrade et al. 2019:[8] [ref. 37167]). •Valid as Prosomyleus rhomboidalis (Cuvier 1818) -- (Jégu et al. 2003:851 [ref. 27668], Kolmann et al. 2020:11 [ref. 37721], Borstein et al. 2022:16 [ref. 39507], Ota et al. 2024:419 [ref. 40817]). Current status: Valid as Prosomyleus rhomboidalis (Cuvier 1818). Serrasalmidae: Myleinae. Distribution: South America: Amazon River basin and northern and eastern Guiana Shield rivers (Brazil, Colombia, French Guiana, Guyana, Suriname and Venezuela). Habitat: freshwater.