I generi "Hyphessobrycon" e "Astyanax" furono proposti originariamente tra il 1854 e il 1908 e riconsiderati nel 1917 da Carl H. Eigenmann. ###>These genera were originally proposed between 1854 and 1908 and are still more or less defined as by Carl H. Eigenmann in 1917, though diverse species have been added to each genus since that time.