che, Gymnogeophagus Casciotta [J. R.], Gómez [S. E.] & Toresanni [N. I.] 2000:55, Figs. 1, 3, 4 [Revista del Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", n.s. v. 2 (no. 1); ref. 24908] Arroyo Urugua-í and ruta provincial 19 frente a la pasarela en Islas Malvinas Province Park, Paraná River, Basin, northeastern Argentina. Holotype: MLP 8747. Paratypes: MACN 8220 (3); MLP 8748-52 (5, 1, 1, 3, 2), 8758 (17). Plus non-type material. Type catalog: Miquelarena & Nadalin 2014:21 [ref. 33466]. •Valid as Gymnogeophagus che Casciotta, Gómez & Toresanni 2000 -- (López et al. 2002:61 [ref. 26808], Kullander in Reis et al. 2003:634 [ref. 27061], López et al. 2003:77 [ref. 27366], Menni 2004:87 [ref. 28131], Malabarba et al. 2015:659 [ref. 34105], Mirande & Koerber 2015:58 [ref. 35117], Casciotta et al. 2017:20 [ref. 35727]). Current status: Valid as Gymnogeophagus che Casciotta, Gómez & Toresanni 2000. Cichlidae: Cichlinae. Distribution: Paraná River basin: Argentina. Habitat: freshwater.