Equus (genus) and pioneer spirit of the West" under the Wild and Free-Roaming Horses and Burros Act of 1971, and in "Kleppe v. New Mexico", the United States Supreme Court ruled that the animals so designated were, as a matter of law, wildlife. Equus (genus) Equus is a genus of mammals in the family Equidae, which includes horses, donkeys, and zebras. Within Equidae, "Equus" is the only recognized extant genus, comprising seven living species. The term equine refers to any member of this genus, including horses. Like Equidae more broadly, "Equus" has numerous extinct species known only from fossils. The genus most
Proconsul africanus has a talus in which the trochlear surface is highly curved and deeply grooved. The foot of this species possessed a transverse arch. "Proconsul africanus" had a brachial index of 96 which is comparable to the extant genus "Pan". Overall the skeleton of this species can be described as being robust. This species had an average body mass of around . Based upon the dental morphology, it is conjectured that "Proconsul africanus" was a frugivorous species. A study by Aiello in 1981 concluded it was a "below-branch feeder." Based on postcranial pieces, "Proconsul africanus" was likely an arboreal quadruped. Proconsul