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  • Miocene Equidae of the Texas Gulf Coastal Plain. 

    Quinn, J.H. (University of Texas at Austin, Bureau of Economic Geology, 1955)
    The Equidae originated from Archaeohippus and evolved through Hippodon leidy, which is revised to include species formerly contained in Parahippus and Merychippus. The revised phylogeny of the Equigae includes three newly ...