VIII. One-Toed Horses (Late Miocene, Pliocene & Pleistocene) From the later Miocene, Merychippus try the main one of earliest bona-fide fast flatlands grazers. (Simpson, 1961, called Merychippus “the fresh new horse with a brand new research”). Merychippus underwent quick speciation, and you will provided increase so you’re able to at the very least 19 the…