 Remains from the Ravenscrag Formation of Saskatchewan, Canada have been assigned to "P. donnae".These remains may also be Cretaceous in age, but the age of the Ravenscrag Formation is not entirely certain.In 2011, remains of a new species of "Protungulatum", "P. coombsi", from the Hell Creek Formation, which is definitely Late Cretaceous (Maastrichtian) in age, proved that "Protungulatum" was present in both the Cretaceous and the Paleocene.