Figure 4
From: Hippotherium Datum implies Miocene palaeoecological pattern

Hippotherium Datum and Cormohipparon dispersal revealed by the distribution of early Late Miocene hipparion in Old World. Environmental data after Fortelius et al.43,44, age data show the first appearance of hipparion in each locality, after Fang et al.16, Deng et al.17, Bernor et al.22,23,26, Arambourg24, Bernor and White25, Deng and Wang32, Wang et al.33, Xue et al.35 (generated with Adobe Photoshop version CS 5 by Y. Chen, based on original world map of GoogleEarth).