Rodents and Lagomorphs. Rodents and Lagomorphs. Rodents are the most successful of all mammalian orders. The order contains at least 34 families, and more than 354 genera and 1685 species.
Locomotor styles include:
Leporids and Ochotonids
In the jackrabbit, the elbow is a lock-and-groove mechanism designed to minimize lateral mobility. Note also partial fusion of radius and ulna.