Published February 9, 2011
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Figure 4 in Dinosaur Census Reveals Abundant Tyrannosaurus and Rare Ontogenetic Stages in the Upper Cretaceous Hell Creek Formation (Maastrichtian), Montana, USA
- 1. Museum of the Rockies, Montana State University, Bozeman, Montana, United States of America
- 2. Museum of Paleontology, University of California, Berkeley, California, United States of America
- 3. Intellectual Ventures, Bellevue, Washington, United States of America
Description
Figure 4. Pie chart of the time averaged census for largebodied dinosaurs from the entire Hell Creek Formation in the study area. Triceratops is the most common dinosaur at 40% (n = 72); Tyrannosaurus is second at 24% (n = 44); Edmontosaurus is third at 20% (n = 36) followed by Thescelosaurus at 8% (n = 15)ı Ornithomimus at 5% (n = 9)ı and Pachycephalosaurus and Ankylosaurus at 1% (n = 2). doi:10.1371/journal.pone.0016574.g004
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