Name: Gryposaurus monumentensis
How it made the Top 10: This new dinosaur species was discovered by a team from Alf Museum, the only nationally-accredited paleontology museum on a high school campus. It is one of the most robust duck-billed dinosaurs ever found, and probably the largest dinosaur in the 75 million-year-old Kaiparowits Formation fossil ecosystem.
Reference: Gates, T.A. & S.D. Sampson. 2007. A new species of Gryposaurus (Dinosauria: Hadrosauridae) from the late Campanian Kaiparowits Formation, southern Utah, USA. Zoological Journal of the Linnean Society 151: 351-376.
Type material: Holotype, Raymond M. Alf Museum of Paleontology, Claremont, California.