probable lineages of Tetonius, Absarokius and Anemorhysis evolved from Teilhardinia or a closely related form from North America. Tetonius and Shoshonius have
both at 1.5–2 kg (3.3–4.4 lb) in weight. Large orbits in genera such as Tetonius, Shoshonius, Necrolemur, and Microchoerus indicate that these taxa were