First Record of Eotragus noyei from the Late Miocene Siwaliks of Pakistan
First Record of Eotragus noyei from the Late Miocene Siwaliks of Pakistan
Abdul Majid Khan1,*, Muhammad Tahir Waseem1, Rana Manzoor Ahmad2, Ayesha Iqbal1, Hafiza Imrana Naz1, Amtur Rafeh1 and Muhammad Ameen1
ABSTRACT
The present paper reports the first record of Eotragus noyei from the late Miocene deposits of Dhok Pathan Formation, Chakwal, Pakistan. The sample comprises maxillary and mandibular fragments along with isolated upper and lower teeth. The morphometric analysis of the dental specimens led us to recognize the sample as belonging to Eotragus noyei, which has been considered as the smallest and the oldest bovid in the Siwaliks. Eotragus noyei is characterized by brachydont teeth, finely rugose enamel, more inclined buccal walls of the molars and small lingual cingula. The inclination of the metaconal area has caused rotation of the metastyle in relation to the antero-posterior tooth axis and thus situated more lingually. The protocone in second upper premolar is well developed and situated posteriorly and also has an anterior lingual constriction. The metaconule in the third upper molar is smaller than the protocone. The dentition in Eotragus noyei is smaller in size as compared to Eotragus sansaniensis and Eotragus lampangensis. In Eotragus noyei the buccal walls in molars are more inclined while in Eotragus sansaniensis, they are less inclined. The genus Eotragus has been reported previously in the Lower Siwaliks of Pakistan; however, the recognition of the present sample as Eotragus noyei has extended the range of this species from Lower to the Middle Siwaliks of Pakistan.
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April 2021
Vol. 53, Iss. 2, Pages 401-800
