Acheronodon

Acheronodon is a genus of herbivorous arboreal mammal which belongs to the family Microcosmodontidae and which was endemic to North America during the Early Paleocene subepoch and in existence for approximately.
It is a member of the extinct order Multituberculata and lies within the suborder Cimolodonta.
The species Acheronodon garbani is known from fossils found in the Puercan -age formations of Tullock Formation in Montana and possible specimens from the Porcupine Hills in Alberta, Canada. The holotype was found in Montana.