It has a distinctive passive "stay apparatus" formed from bones and tendons to help it conserve energy while standing for long periods. Dinohippus was the first horse to show a rudimentary form of this character, providing additional evidence of the close relationship between Dinohippus and Equus.
The organism possesses a unique passive "stay mechanism" involving bones and tendons to save energy while standing for extended periods. Dinohippus displayed an early form of this characteristic, supporting the close association between Dinohippus and Equus.