HEMPHILLIAN MAMMALIAN ASSEMBLAGE FROM NORTHEASTERN OREGON

Abstract

The Hemphillian McKay Reservoir, Oregon, local fauna is correlated with the Paote and Ertemte faunas of North China and Montpellier fauna of France. The highest degree of N. china-N. America faunal interchange is among the carnivores, and the lowest in the edentates, primates, and artiodactyls. The local habitat of the major community represented at McKay Reservoir is that of a pond-bank association. Described are: HYDROSCAPHEUS, type H. americanus (Talpidae); LEPTODONTOMYS, type L. oregonensis (Eomyidae); PROSOMYS, type P. mimus (Cricetidae); Ochotona spanglei, Hypolagus oregoneneis (sic; properly spelled in text), Citellus (Otospermophilusy)Wilsoni, Citellus (Citellus) mckayensis, Marmota oregonensis, Perognathus sargenti, Canis condoni, Felis longignathus, Prosthennops brachirostris.