Genus: Prodiplocynodon MOOK, 1941
Etymology: Greek, pro, "before" and Diplocynodon.

Species: langi MOOK, 1941
Etymology:

Holotype: AMNH 108

Locality: Cheyenne River, Niobrara County, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Skull missing left anterior side.