Among the models of extinct mammals are Vulpavus, a carnivore that had a long thin body and tail, well suited for quick movements both in trees and on the ground; Coryphodon
, a short-tusked hippo-like wader; and Thuliadanta, an extinct tapir that had a flexible, trunk-like snout.
The team used an analysis of carbon and oxygen isotopes extracted from the fossil teeth of three varieties of mammals from Ellesmere Island - a hippo-like, semi-aquatic creature known as Coryphodon
, a second, smaller ancestor of today's tapirs and a third rhino-like mammal known as brontothere.
Paleopathology of early Cenozoic Coryphodon