Trismila and Sarcotenrex

The order Trismila, whose members have three sets of carnassal teeth, did not survive the end of the Cretaceous. There were four members, all of the genus Trismilus: T. decca, T. malagsay, T. megalos, T. minor. T. minor and T. decca avoided competing because T. minor lived on the ground, and T. Decca in the trees. T. malagsay, like T. decca, was about 6 inches long. T. minor was only 4 inches. T. megalos was 9 inches long. All would probably take any prey they could kill.

Sarcotenrex was the last common ancestor of all three orders. Sarcotenrex minor only grew to 5 inches long, while S. dodon was 7 inches. They are not placed within any particular order.