Didelphodon sp. mammal premolar tooth

"LATE CRETACEOUS MAMMALIAN FAUNA FROM THE HELL CREEK

FORMATION, SOUTHEASTERN MONTANA"

..The richest known Late Cretaceous mammalian fauna from the Hell Creek Formation was discovered in southeastern Montana in the 1980’s. Although a faunal list was included in a paleobiogeographic study, the taxa have never been described. This study describes and compares this important fauna to other Late Cretaceous mammalian faunas.

There are some 20 mammal producing localities, but the richest are the four localities composing Claw Butte Anthills local fauna and the single richest locality composing the Spigot - Bottle local fauna. Over 1000 mammal sp

ecimens have been recovered by screenwashed from an in situ channel fill composed of silty sand...