What evidence supports the conclusion that hadrosaurus was a plant eater?

The evidence supporting the conclusion that Hadrosaurus was a plant eater is found in the characteristics of its fossilized teeth. Specifically, the teeth of Hadrosaurus are flat, resembling the teeth of modern herbivores. This flat structure is well-suited for grinding and processing plant material, which aligns with the dietary habits of herbivorous species. Herbivorous animals typically have teeth adapted for breaking down fibrous plant tissues, and the morphology of Hadrosaurus’ teeth suggests it was equipped to consume a plant-based diet effectively.

Understanding dental structures is crucial in paleontology as the shape and wear patterns of teeth can provide significant insights into an animal's feeding habits and ecological niche. In contrast to carnivorous dinosaurs, which possess sharp, serrated teeth for slicing through meat, the flattened teeth of Hadrosaurus clearly indicate its role as a herbivore in its ecosystem.