Oldest horned dinosaur species in North America found in Montana: Hooked beak, sharply pointed cheeks distinguishes neoceratopsian species

Scientists have named the first definite horned dinosaur species from the Early Cretaceous in North America. The limited fossil record for neoceratopsian--or horned dinosaurs--from the Early Cretaceous in North America restricts scientists' ability to reconstruct the early evolution of this group.

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