[2] In 1929, Roy Moodie described two-digit traces from the Red Beds of Texas under the ichnospecies Varanopus palmatus, V. impressus, V. elrodi, and V.

Because the type specimen of V. palmatus is broken, and V. impressus and V. elrodi are incomplete, Dromopus didactylus is generally the preferred name.

[2] In 1963 and 1964, Paul Ellenberger described many ichnospecies of Dromopus: D. neooctavianensis, D. brevidigitatus, D. duidigitatus, D. octavianensis, D. bidigitatus, D. curtidigitus, D. inversidigitulifer, D. rabejacensis, D. rectidigitus, D. rectangulus, D. exsultans, and D. cursor.

Although some European researchers during the 1980s persisted in using the name Protritonichnites, Dromopus has generally found more widespread adoption.

[2] Dromopus tracks have been ascribed to lizard-like reptiles, including the diapsid Araeoscelidia and the parareptilian Bolosauridae.