1) Transitional fossil 
(from the article `horse`) It was a different branch, however, that led from Miohippus to the modern horse. The first representative of this line, Parahippus, appeared in the ... ...of early horses, found as fossils in deposits from the Middle and Late Miocene Epoch (16.4 to 5.3 million years ago). Merychippus descended from ... [2 r...