Abstract

A theropod tibia from the Phu Kradung Formation of Mukdahan Province, northeastern Thailand, is described and referred to the family Sinraptoridae, previously known only from the Jurassic of China (Xinjiang and Sichuan). This find confirms the affinities of the vertebrate assemblage from the Phu Kradung Formation with Late Jurassic faunas from China. The Late Jurassic age suggested by fossil vertebrates for the Phu Kradung Formation is not in good agreement with an attribution to the Early Cretaceous based on palynomorphs.

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