Genus: Agathaumas non COPE, 1872 (nomen dubium)
Etymology:

Species: milo COPE, 1874 (nomen dubium)
Etymology:
= Hadrosaurus milo (COPE, 1874) HAY, 1901 (nomen dubium)
= Agathaumus milo HAY, 1901 (sic)

Holotype: USNM 244537

Locality: Laramie beds, South Platte River, Colorado.

Horizon: Denver Formation.

Biostratigraphy:

Age: Lancian age, Late Maastrichtian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Sacral centrum and a proximal end of tibia.