Ornithomimosauria

A long-handed ornithomimid from northern Mexico whose metacarpals were unusually longer than its metatarsals, known from one headless partial skeleton.

A large, toothless Mongolian ornithomimid with a small head, long neck and powerful running legs, known from several skeletons spanning different growth stages.

A giant, deep-bodied Mongolian ornithomimosaur with enormous arms, a toothless duck-like beak, tall back spines and a broad-footed build unlike any other known theropod.