The Hedgehog Ocajila Macdonald, 1963 (Mammalia, Lipotyphla, Erinaceidae) from the Oligocene (Orellan to Arikareean) of North America

A large sample of previously undescribed specimens of the rare hedgehog (Erinaceidae) Ocajila Macdonald, 1963, allows for a more complete and detailed description of the dentition of this genus. Previously, only the single (type) species, Ocajila makpiyahe Macdonald, 1963, had been described and limited to fewer than five specimens. The new material has allowed for the recognition of two new species, Ocajila macdonaldi from the Whitneyan of Montana, and Ocajila rasmusseni from the Arikareean of Montana. In addition, an indeterminate species is recognized from the Orellan of Montana, representing the earliest occurrence of the genus.