Unlike modern pigs, long-nosed peccaries had upper incisors, or tusks, that grow downwards.
They had a long, slender muzzle and jaw and were about the size of a small white-tailed deer.
Most paleontologists believe these animals were omnivorous, their diet dominated by plant matter, but occasionally supplemented by small animals (e.g., eggs, mice, worms).
Unlike the flat-headed peccary, the long-nosed peccary was probably a solitary animal. They were found in caves, because often they were devoured by scimitars or mountain lions. In general, they mostly occupied parkland or forested habitats.
Long-nosed peccaries were distributed throughout eastern north America. With concentrations in Appalacia and Florida. Most fossil areas are found in the south and south-east US. Though some are from west Texas in Fowlkes Cave, up north to Kimmswick and Crankshaft Cave in Missouri. And, Pennsylvanias Frankstown and Hollidaysburg Fissue caves, and, Prairie Creek in Indiana.