meridionalis, Gymnogeophagus Reis [R. E.] & Malabarba [L. R.] 1988:273, Figs. 4-17, 19 [Revista Brasileira de Zoologia v. 4 (no. 4); ref. 6638] Rio Negro Road at BR-153, Bagé, Rio Grande do Sul, Brazil. Holotype: MZUSP 28461. Paratypes: CIMLP 26.4.84.1 (12), DZUFRGS 3178 (2), HMNG 2169.59 (1), MACN 7466 [ex. MACN 3905] (5), MAPA (4 lots, 14), MCP (6 lots, 38), MCZ 61067 [ex MCP 9317] (1), MZUSP (2 lots, 18), NRM 36603 (1), USNM 270286 (2), ZMB 31372 [ex MCP 9465] (1); MCP 8633 [ex ...] (12).. Type catalog: Braga & Piacentino 1994:103 [ref. 23697], Paepke & Schindler 2013:269 [ref. 32895], Miquelarena & Nadalin 2014:21 [ref. 33466]. •Valid as Gymnogeophagus meridionalis Reis & Malabarba 1988 -- (Reis et al. 1992:266 [ref. 20011], Wimburger et al. 1998:511 [ref. 23857], Casciotta et al. 2000:53 [ref. 24908], Kullander in Reis et al. 2003:635 [ref. 27061], López et al. 2003:77 [ref. 27366], Menni 2004:87 [ref. 28131], Litz & Koerber 2014:34 [ref. 33622], Malabarba et al. 2015:660 [ref. 34105], Mirande & Koerber 2015:58 [ref. 35117], Loureiro et al. 2016:[8] [ref. 34384], Bertaco et al. 2016:426 [ref. 34561], Nión et al. 2016:50 [ref. 35565], Casciotta et al. 2017:20 [ref. 35727], Loureiro et al. 2023:156 [ref. 40506]). Current status: Valid as Gymnogeophagus meridionalis Reis & Malabarba 1988. Cichlidae: Cichlinae. Distribution: South America: Uruguay River drainage in Uruguay and Brazil and smaller drainages in Argentina (Argentina, Brazil and Uruguay). Habitat: freshwater.