What is Hadrosauridae?
Hadrosauridae, the duck-billed dinosaurs, were abundant Late Cretaceous plant-eaters with broad beaks and dense batteries of grinding teeth. Fossils are known from North America, Asia and Europe. The family splits into lambeosaurines, which have hollow crests, and saurolophines, which have solid crests or none.
Because hadrosaurid bones and skulls are common, they are among the best understood dinosaurs for growth, herd-related bone beds and nesting evidence in some members. Details such as the exact use of crests as display or sound structures are still interpretations.
How this group is defined here
Members are the 8 field notes whose family or immediate parent group in the Paleobiology Database catalogue is Hadrosauridae. The interpreted diet field across the group is herbivore, based on skeletal features rather than direct observation. Groups are revised when new fossils are described, and some genera are placed here with less certainty than others, so each field note records its sources and limits.
