Fortunately
horned dinosaurs have one of the best fossil records of any
group of dinosaurs. There are close to 400 specimens in
museum collections around the world (Dodson, 1996).
Twenty-three genera and perhaps 30 species have been
described to date, and approximately two-thirds of the 23
genera are based on essentially complete skulls and
skeletons (Dodson, 1996).
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