Abstract: In this research, the odontology of Hipparion teeth of Eski Develiköy-Düzpınar biozone are investigated ,and stratigraphic results ,and environmental data are interpretated. As a result of this study, it has been confirmed that the Hipparion of Düzpınar kept their odontologic characters which appeared to resemble to those of the archaic North American Hipparion, For the age of biozone, the posibility of earliest Valesian is preferred.