Species: paucidens (MARSH, 1889) OSTROM, 1964
= Hadrosaurus paucidens MARSH, 1889 (nomen dubium)
Etymology: Latin, pauci, "little" and Latin, dens, "teeth."
= Ceratops paucidens (MARSH, 1889) HAY, 1901(nomen dubium)
= Hadrosaurus paucideres KEYES, 1894 (sic)

Holotype: USNM 5457

Locality: Dog Creek, (Cow Island, MERRILL, 1907), Fergus County, Montana.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material: Left squamosal, right maxilla.