. . "Animalia" . "Percidae" . . . . . . "Actinopterygii" . "Perciformes" . . "Chordata" . "Etheostoma ditrema" . . "Etheostoma" . . "Etheostoma ditrema Ramsey and Suttkus 1965" . "Ramsey and Suttkus 1965" . . . "Coldwater darter" . . .