ternetzi, Tetragonopterus Boulenger [G. A.] 1895:528 [Proceedings of the Zoological Society of London 1895 (pt 3); ref. 14576] Descalvados, Mato Grosso, Rio Paraguay, 16°46’S, 57°44’W, Brazil. Lectotype: BMNH 1885.5.17.163. Paralectotypes: BMNH 1895.5.17.164-167 (4). Lectotype selected by Benine et al. 2015:17 [ref. 33792]. •Valid as Gymnocorymbus ternetzi (Boulenger 1895) -- (Gómez & Chebez 1996:50 [ref. 23791], Britski et al. 1999:32 [ref. 24147], Fuller et al. 1999:183 [ref. 25838], Lima & Gerhard 2001:112 [ref. 25355], Lasso et al. 2001:95 [ref. 25928], Benine 2002:293 [ref. 26541], Benine in Reis et al. 2003:128 [ref. 27061], López et al. 2003:26 [ref. 27366], Menni 2004:77 [ref. 28131], Mirande 2010:504 [ref. 31006], Kottelat 2013:215 [ref. 32989], Sarmiento et al. 2014:184 [ref. 35004], Benine et al. 2015:14 [ref. 33792], Mirande & Koerber 2015:20 [ref. 35117], Teixeira et al. 2016:474 [ref. 34088], Koerber et al. 2017:33 [ref. 35267], Meza-Vargas et al. 2021:18 [ref. 39298]). Current status: Valid as Gymnocorymbus ternetzi (Boulenger 1895). Acestrorhamphidae: Pristellinae. Distribution: South America: Paraguay and Guaporé River basins: Argentina, Bolivia, Brazil, Paraguay and Peru; introduced elsewhere. Habitat: freshwater.