guazu, Odontesthes de Buen [F.] 1953:40, Figs. 27-28 [Boletim do Instituto Oceanografico, São Paulo v. 4 (no. 1-2); ref. 694] Río Uruguay, Depto. Salto, Uruguay. Holotype: MHNM CI 1805 [ex VT 1049]. Type catalog: Loureiro et al. 2016:413 [ref. 35150]. •Synonym of Odontesthes humensis de Buen 1953 -- (Dyer 1998:535 [ref. 23858], Bemvenuti 2002:265 [ref. 26202], Dyer in Reis et al. 2003:521 [ref. 27061], Menni 2004:85 [ref. 28131], Litz & Koerber 2014:29 [ref. 33622], Koerber et al. 2015:3 [ref. 35179], Koerber et al. 2017:7 [ref. 35083], Koerber et al. 2017:8 [ref. 35632]). Current status: Synonym of Odontesthes humensis de Buen 1953. Atherinopsidae: Atherinopsinae. Habitat: freshwater.