rupununi, Charax Eigenmann [C. H.] 1912:402 [Memoirs of the Carnegie Museum v. 5 (no. 1); ref. 1227] Rupununi River, Guyana. Holotype: FMNH 53663 [ex CM 2135]. Paratypes: (4) CAS 41301 [ex IU 12314, not IU 12814] (1), FMNH 53664 (1). Type catalog: Henn 1928:70 [ref. 12305], Ibarra & Stewart 1987:22 [ref. 12367]. •Valid as Charax rupununi Eigenmann 1912 -- (Lucena 1987:50 [ref. 17724], Lucena 1989:104 [ref. 12852], Lucena & Menezes in Reis et al. 2003:201 [ref. 27061], Menezes & de Lucena 2014 221 [ref. 33369], Taphorn et al. 2022:14 [ref. 41297]). Current status: Valid as Charax rupununi Eigenmann 1912. Characidae: Characinae. Distribution: South America: Jacaré Lake, Essequibo and Trombetas River basins (Brazil and Guyana). Habitat: freshwater.