Pareumys Remains from the Later Eocene of California

Specimens referable to the genus Pareumys are now known from three localities in the Sespe formation and one locality in the Poway conglomerate. Unfortunately, the material is extremely fragmentary although not especially rare. On the other hand, a number of isolated upper cheek teeth have been obtained, and the upper dentition has been recorded previously only by a single upper molar of Pareumys (?) troxelli. In addition, the stratigraphic range of the Californian specimens is relatively great, and increases somewhat our knowledge concerning the evolution and affinities of the genus.