Species that contain: Poptella and orbicularis [ 2 ] records

orbicularis, Tetragonopterus Valenciennes [A.] in Cuvier & Valenciennes 1850:138 [Histoire naturelle des poissons v. 22; ref. 1014] Essequibo River, Guyana. Lectotype: MNHN 0000-6343. Paralectotypes: MNHN 0000-4400 (1), 1987-1871 (1). Type catalog: Bertin 1948:23 [ref. 19577]. Lectotype selected by Reis 1989:62 [ref. 14219]. •Valid as Poptella orbicularis (Valenciennes 1850) -- (Ortega & Vari 1986:9 [ref. 9708], Taphorn 1992:302 [ref. 23654], Chang & Ortega 1995:7 [ref. 24302]). •Valid as Ephippicharax orbicularis (Valenciennes 1850) -- (Gómez & Chebez 1996:49 [ref. 23791]). •Valid as Brachychalcinus orbicularis (Valenciennes 1850) -- (Reis 1989:60 [ref. 14219], Reis in Reis et al. 2003:209 [ref. 27061], DoNascimiento et al. 2017:46 [ref. 35633], Garcia-Ayala et al. 2017:570 [ref. 35695], Meza-Vargas et al. 2021:17 [ref. 39298], Borstein et al. 2022:16 [ref. 39507], Garcia-Ayala et al. 2024:9 [ref. 40855]). Current status: Valid as Brachychalcinus orbicularis (Valenciennes 1850). Characidae: Stethaprioninae. Distribution: South America: Amazon and Orinoco river basins (Colombia, Brazil, Guyana, Peru and Suriname). Habitat: freshwater.

paraguayensis, Fowlerina Eigenmann [C. H.] in Eigenmann, McAtee & Ward 1907:153 [Annals of the Carnegie Museum v. 4 (no. 2) (art. 7); ref. 1261] Descalvados, Mato Grosso, Brazil. Lectotype: BMNH 1895.5.17.200. Paralectotypes: BMNH 1892.4.20.36-38 (3), 1895.5.17.201-204 (4), 1895.5.17.205-207 (5). Based on the Paraguayan specimens of Tetragonopterus compressus Günther. Lectotype selected by Reis 1989:33 [ref. 14219]. See also the types of Brachychalcinus retrospina. •Synonym of Ephippicharax orbicularis (Valenciennes 1850), but a valid subspecies -- (Gómez & Chebez 1996:49 [ref. 23791]). •Valid as Poptella paraguayensis (Eigenmann 1907) -- (Reis 1989:32 [ref. 14219], Britski et al. 1999:56 [ref. 24147], Reis in Reis et al. 2003:210 [ref. 27061], López et al. 2003:21 [ref. 27366], Menni 2004:76 [ref. 28131], Mirande 2010:505 [ref. 31006], Sarmiento et al. 2014:50, 185 [ref. 35004], Mirande & Koerber 2015:21 [ref. 35117], Koerber et al. 2017:33 [ref. 35267], Garcia-Ayala et al. 2017:572 [ref. 35695], Garcia-Ayala & Benine 2019:7 [ref. 36770], Garcia-Ayala & Benine 2021:7 [ref. 38089]). Current status: Valid as Poptella paraguayensis (Eigenmann 1907). Characidae: Stethaprioninae. Distribution: South America: Paraguay and lower Paraná River basins: Argentina, Brazil, Bolivia and Paraguay. Habitat: freshwater.