Species: mirus WILLISTON, 1903
Etymology: Latin, mirus, "wonderful."

Holotype: KUVP 1199

Locality: Ashland, Clark County, Kansas.

Horizon: Kiowa shale.

Biostratigraphy:

Age: Upper Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: Femur.