Dinosaur Census Reveals Abundant Tyrannosaurus and Rare Ontogenetic Stages in the Upper Cretaceous Hell Creek Formation (Maastrichtian), Montana, USA John R. Horner1*, Mark B. Goodwin2, Nathan Myhrvold3 1 Museum of the R

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Late Cretaceous Cretaceous Mesozoic Chasmosaurines Pachycephalosaurs Tyrannosaurus Tyrannosaurids Triceratops Edmontosaurus annectens Edmontosaurus Thescelosaurus Pachycephalosaurus		Dinosaur Census Reveals Abundant Tyrannosaurus and Rare Ontogenetic Stages in the Upper Cretaceous Hell Creek Formation (Maastrichtian), Montana, USA John R. Horner1*, Mark B. Goodwin2, Nathan Myhrvold3 1 Museum of the R Add to Reading List Source URL: www.ncbi.nlm.nih.gov Download Document from Source Website File Size: 515,25 KB Share Document on Facebook

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