Re-evaluation of Pentaceratops and Chasmosaurus (ornithischia: Ceratopsidae) in the Upper Cretaceous of the Western Interior
نویسندگان
چکیده
Pentaceratops sternbergii is an index fossil of the Kirtlandian LVA, and is known from the Fruitland and Kirtland formations, San Juan Basin, New Mexico and from the Williams Fork Formation of Colorado. We remove Chasmosaurus mariscalensis (Aguja Formation, Big Bend National Park, Texas) from Chasmosaurus and make it the type species of a new genus, Agujaceratops. Supposed chasmosaurine endemism or provincialism during the late Campanian in the Western Interior is not clear, as most of the southern chasmosaurines are younger than their north-
منابع مشابه
A Re-Evaluation of the Chasmosaurine Ceratopsid Genus Chasmosaurus (Dinosauria: Ornithischia) from the Upper Cretaceous (Campanian) Dinosaur Park Formation of Western Canada
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