A study on dinosaur fossils from the Sasayama Group

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A rich vertebrate fossil assemblage was found from the Lower Cretaceous Sasayama Group in Tamba and Sasayama Cities of Hyogo Prefecture, SW Japan. The Sasayama Group consists of fluvial sediments deposited under a climate characterized by distinct dry and wet seasons. The vertebrate fossils have been excavated from the flood plain deposits of "the lower formation" of the Group. The flood plain deposits of the formation have yielded dinosaur remains representing seven dinosaur taxa including a partial skeleton of a basal titanosauriform, numerous skeletal remains of frogs including complete skeletons, and jaw bones of lizards and an eutherian mammal.