Edmontosaurus regalis

rdf:langString Edmontosaurus regalis

rdf:langString Late Cretaceous,

rdf:langString Edmontosaurus

rdf:langString Holotype skeleton of Thespesius edmontoni, now thought to be a young E. regalis

rdf:langString regalis

rdf:langString *Thespesius edmontoni (Gilmore, 1924)

rdf:langString Edmontosaurus regalis is a species of comb-crested hadrosaurid (duck-billed) dinosaur. Fossils of E. regalis have been found in rocks of western North America that date from the late Campanian stage of the Cretaceous Period 73 million years ago, but it may have possibly lived till the early Maastrichtian. E. regalis was one of the largest hadrosaurids, measuring up to 12 metres (39 ft) long and weighing around 4.0 metric tons (4.4 short tons). It is classified as a genus of saurolophine (or hadrosaurine) hadrosaurid, a member of the group of hadrosaurids which lacked large, hollow crests, instead having smaller solid crests or fleshy combs. The distribution of E. regalis fossils suggests that it preferred coasts and coastal plains. It was a herbivore that could move on both two legs and four. Because it is known from several bone beds, E. regalis is thought to have lived in groups. The wealth of fossils has allowed researchers to study its paleobiology in detail, including its brain, how it may have fed, and its injuries and pathologies.