constellatus, Gymnogeophagus Malabarba [L. R.], Malabarba [M. C.] & Reis [R. E.] 2015:648, Figs. 6c, 9 [Neotropical Ichthyology v. 13 (no. 4); ref. 34105] Rio Conceição, tributary to Rio Ijuí, middle río Uruguay basin, Rio Grande do Sul, Brazil, 28°27'48"S, 53°57'17"W. Holotype: MCP 10499. Paratypes: MCP, UFRGS, ZVCP. •Valid as Gymnogeophagus constellatus Malabarba, Malabarba & Reis 2015 -- (Bertaco et al. 2016:426 [ref. 34561], Casciotta et al. 2017:3 [ref. 35497], Říčan et al. 2017:1 [ref. 35634], Alonso et al. 2019:S1 [ref. 36529], Koerber et al. 2019:11 [ref. 36736], Mirande & Koerber 2020:2 [ref. 37594]). Current status: Valid as Gymnogeophagus constellatus Malabarba, Malabarba & Reis 2015. Cichlidae: Cichlinae. Distribution: South America: Rio Ijuí and tributaries, middle río Uruguay basin, Rio Grande do Sul (Brazil) and Chimiray-Miní and Itacaruaré rivers (Argentina). Habitat: freshwater.