difficilis, Notropocharax Marini [T. L.], Nichols [J. T.] & LaMonte [F. R.] 1933:6, Fig. 3 [American Museum Novitates No. 618; ref. 2889] Rio Mogi-Guassú, São Paulo, Brazil. Holotype: AMNH 12247. Paratypes: AMNH 12248 (5). •Synonym of Aphyocharax dentatus Eigenmann & Kennedy 1903 -- (Lima in Reis et al. 2003:198 [ref. 27061], Mirande & Koerber 2015:17 [ref. 35117], Koerber et al. 2017:25 [ref. 35267]). Current status: Synonym of Aphyocharax dentatus Eigenmann & Kennedy 1903. Characidae: Aphyocharacinae. Habitat: freshwater.