Abstract

Equus suessebornensis is one of the most intriguing species of the Early and Middle Pleistocene Eurasian Equus. Although it was described from the Middle Pleistocene site of Süssenborn, in recent years its biochronological correlation has been extended to the Early Pleistocene, raising a debate in the scientific community. In this contribution, we provide a complete ontogenically-based description of the Akhalkalaki E. suessenbornensis samples, and we compare it by multivariate and statistical analyses with the Early and Middle Pleistocene European fossil record. Moreover, we provide new paleoecological insights utilizing body mass, mesowear and net primary productivity estimates. Our outcomes provide a new perspective on the E. suessenbornensis morphology and variability, but also new interpretations for its paleoecology, biochronology, paleobiogeography and evolution. Eventually, these results provide a reassessment of equid evolution during the Early – Middle Pleistocene Transition in Western Eurasia, a critical period for the dynamics of the Quaternary faunas and paleoenvironments.

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