Barylambdidae is an extinct family of

pantodont Pantodonta is an extinct suborder (or, according to some, an order) of eutherian mammals. These herbivorous mammals were one of the first groups of large mammals to evolve (around 66 million years ago) after the end of the Cretaceous. The last ...

mammals from North America.

References

Pantodonts Paleogene mammals of North America Prehistoric mammal families {{Paleo-mammal-stub