New fossil material from the latest early Miocene Manchar Formation in the Ranikot area (Sindh, Pakistan) provides information about the poorly known listriodontine suid Listriodon guptai Pilgrim, 1926. Recognition of this taxon, initially described on the basis of a fragmentary upper molar, allows biochronologic correlations for the base of the Manchar Formation with penecontemporaneous formations of Pakistan where this taxon also occurs (Sulaiman Range and Potwar Plateau). Listriodon guptai may be closely related to the bunolophodont species Listriodon affinis of doubtful stratigraphic provenance and age in the Bugti Hills, as well as to the fully lophodont Listriodon pentapotamiae which occurs throughout the Chinji Formation in the Potwar Plateau. The early occurrence of these taxa pleads for an early diversification of the listriodonts in the Indo-Pakistan Subcontinent during the late early Miocene.
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Vol. 20 • No. 3