Bistahieversor attacking a pair of Pentaceratops.

From the Kirtland Formation of New Mexico we have a protofeathered Tyrannosaur called Bistahieversor attacking a pair of Pentaceratops. A scene from about 74 Million years ago when the inland sea that split North America was still present. Back then New Mexico was covered in river deltas and flood plains and quite tropical. Bisahieversor was about 26 to 28 feet long. It is not truly known if they had protofeathers or not.

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