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First horned dinosaur from Mexico

Western North America, such as Chasmosaurus, Pentaceratops and Triceratops.


  • Coahuilaceratops had the largest horns above its eyes of any known ceratopsid dinosaur.

  • Coahuilaceratops had a very thick nasal bone with a relatively small rounded nose horn that is unlike that of any other ceratopsid dinosaur.

  • Coahuilaceratops stood on all four legs and was not bipedal.

Age and Geology

  • Coahuilaceratops is from the Late Cretaceous Period's Campanian Age, which spanned from approximately 84 million to 70 million years ago.

  • Coahuilaceratops was excavated from the Cerro del Pueblo Formation, the basal formation of the Difunta Group in the Parras Basin within the state of Coahuila, Mexico. These rocks are dated to about 72 million years ago.

The Fossils

  • Coahuilaceratops specimens are permanently housed in the collections of the Museum of the Desert in Saltillo, Mexico. Casts of the fossils are reposited in the collections of the Utah Museum of Natural History in Salt Lake City.

  • The skull of Coahuilaceratops will be unveiled at the Museum of the Desert later this year.


Contact: Patti Carpenter
University of Utah

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