Hulbert, Richard C.MacFadden, Bruce J.2005-10-062005-10-061991http://hdl.handle.net/2246/508361 p. : ill. ; 26 cm.Includes bibliographical references (p. 57-61)9105490 bytesapplication/pdfen-USQL1 .A436 no.3000 1991Merychippus.Mammals, Fossil -- North America.Paleontology -- Miocene -- North America.Paleontology -- North America.Morphological transformation and cladogenesis at the base of the adaptive radiation of Miocene hypsodont horses. American Museum novitates ; no. 3000text