Pliocene vertebrate locality of Çalta, Ankara, Turkey. 7. Hipparion

The genus Hipparion is represented in the Pliocene of the Western Region, Turkey, at Çalta, by fragmentary skulls, mandibles, teeth and limb bones. Two large species are present; most of the fossils belong to a robust form, which we consider as a new species: Hipparion heintzi. A few bones belong to a slender hipparion, Hipparion cf. longipes Gromova, 1952. Equations to predict body weight using metapodial and tooth variables are proposed. Estimations of body weights based on sections of metapodials (distal breadths multiplied by distal depths) seem less approximative than those based on occlusal tooth surfaces (lengths multiplied by breadths).