Another short one today
in which the skull elements of Apatemys chardini (Marsh 1872, Eocene, Figs. 1, 2) are restored to their in vivo positions as determined by molar occlusion and jaw glenoid insertion.
Apatemys chardini (Marsh 1872, Eocene, 50-33 mya) was a squirrel-lke arboreal herbivore with a massive skull. Here it nests between the much larger Trogosus and the more plesiomorphic, Tupaia, a tree shrew. Apatemys had long slender fingers, a long flexible lumbar region, and a long gracile tail.
Marsh OC 1872. Preliminary description of new Tertiary mammals. Part II. American Journal of Science 4(21):202-224.