rotundatus, Chalceus Jardine [W.] in Schomburgk 1841:209 [The Natural history of fishes of Guiana; ref. 18707] Lago Amapá, Rio Purus drainage, Acre, Brazil, 10°02'36"S, 67°50'24"W. Neotype: MCP 34863. Neotype designated by Malabarba 2004:175 [ref. 28150] •Valid as Triportheus rotundatus (Jardine 1841) -- (Ortega & Vari 1986:10 [ref. 9708], Planquette et al. 1996:232 [ref. 22818], Malabarba 1998:76 [ref. 23840], Malabarba & Lima in Reis et al. 2003:158 [ref. 27061], Malabarba 2004:174 [ref. 28150], Sarmiento et al. 2014:54, 185 [ref. 35004], Mariguela et al. 2016:132 [ref. 34141], DoNascimiento 2016:538 [ref. 34727], DoNascimiento et al. 2017:64 [ref. 35633], Careaga et al. 2020:76 [ref. 37774], Silvano et al. 2020:85 [ref. 38133], Meza-Vargas et al. 2021:20 [ref. 39298], Malabarba 2024:437 [ref. 40817]). Current status: Valid as Triportheus rotundatus (Jardine 1841). Triportheidae: Triportheinae. Distribution: South America: Amazon River basin and coastal rivers of the Guianas (Brazil, Colombia, Bolivia, French Guiana, Guyana, Peru, Suriname and ?Venezuela). Habitat: freshwater.