A reassessment of horned dinosaur fossils discovered ninety years ago in the famous Dinosaur Provincial Park Formation of Alberta has led to the erection of a new chasmosaurine species. Previously assigned as the holotype for the species Chasmosaurus russelli, the fossil material (CMNFV 8800), has been re-described as Cryptarcus russelli. This revision of chasmosaurine fossil material demonstrates how modern research continues to refine dinosa…
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