meridionalis, Hyphessobrycon Ringuelet [R. A.], Miquelarena [A. M.] & Menni [R. C.] 1978:248, Figs. 2-3 [Limnobios (La Plata) v. 1 (no. 7); ref. 8888] Canal Delgado, Rio de La Plata, Los Talas, Argentina. Holotype: MLP 8339 [ex ILPLA 30.3.77.1]. Paratypes: MLP 8340 [ex ILPLA 30.3.77.2] (9). Type catalog: Koerber 2007:1 [ref. 29776], Miquelarena & Nadalin 2014:7 [ref. 33466]. •Valid as Hyphessobrycon meridionalis Ringuelet, Miquelarena & Menni 1978 -- (Malabarba 1989:135 [ref. 14217], Lima & Malabarba in Reis et al. 2003:138 [ref. 27061], López et al. 2003:27 [ref. 27366], Menni 2004:77 [ref. 28131], Almirón et al. 2004:674 [ref. 27987], Almirón et al. 2006:895 [ref. 29163], Miquelarena & López 2010:6 [ref. 30749], Litz & Koerber 2014:16 [ref. 33622], Mirande & Koerber 2015:26 [ref. 35117], Bertaco et al. 2016:414 [ref. 34561], Petry et al. 2016:302 [ref. 34966], Nión et al. 2016:30 [ref. 35565], Giora & Wingert 2023:136 [ref. 41026], Loureiro et al. 2023:78 [ref. 40506]). Current status: Valid as Hyphessobrycon meridionalis Ringuelet, Miquelarena & Menni 1978. Acestrorhamphidae: Hyphessobryconinae. Distribution: South America: lower Paraná River and coastal river basins of Rio Grande do Sul State (Argentina, Brazil and Uruguay). Habitat: freshwater.