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The Kirtland Formation

Late Cretaceous 76–73 million years ago, New Mexico.

Bistahieversor vs Pentaceratops

Bistahieversor vs Pentaceratops

Bistahieversor attacking on juvenile Kritosaurus.

Bistahieversor attacking on juvenile Kritosaurus.

Parasaurolophus tubicen and Pentaceratops

Parasaurolophus tubicen and Pentaceratops