Colonial Spanish

Horse

The Colonial Spanish horse is a foundation type of horse descended from the original Iberian horse stock brought from Spain to the Americas. The ancient form of the breed was once called the jennet or Spanish barb. The term encompasses many strains or breeds now found primarily in North America. Its extinction status is considered critical and the horses are registered by several authorities.

The most direct descendant today is possibly the Spanish Mustang. Though the original Mustang descended from the Colonial Spanish Horse, not all feral horses of the Americas today are of colonial Spanish descent, as there has been considerable crossbreeding in some areas.

http://en.wikipedia.org/wiki/Colonial_Spanish_Horse