"Coppercheek darter" . "Chordata" . . "Animalia" . . . . . "Actinopterygii" . . . "Percidae" . . . "Perciformes" . . . "Etheostoma aquali Williams and Etnier 1978" . "Etheostoma aquali" . "Etheostoma" . . . . . "Williams and Etnier 1978" .