Abstract
This paper describes the first fossil porcupine remains from Iran. Four upper cheek teeth and two fragmentary lower incisors present sufficient characters for identification as Hystrix aryanensis, a species previously known from the late Miocene locality of Molayan (Afghanistan) estimated at ca. 7–8 Ma. The dental features of porcupines are discussed to show their systematic value and highlight evolutionary trends in late Miocene and Pliocene porcupines. This study also discusses the dispersal history of fossil porcupines in relation to paleobiogeographic provinces and environmental changes during late Miocene to late Pliocene time.
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