Eigenmannia

1. Two inconspicuous dark-brown longitudinal stripes on the flank.............................................................. E. virescens

1’. Three or four conspicuous dark-brown longitudinal stripes on the flank .............................................................. 2

2. Premaxilla with nine or 10 teeth distributed in two rows; pectoral fin with ii,11 or 12 rays and anal fin with 151 to 170 rays.............................................................. E. guairaca

2’. Premaxilla with 31 to 33 teeth distributed in four rows; pectoral fin with ii,14 or 15 rays and anal fin with 176 to 217 rays.............................................................. E. trilineata