herbivorous dinosaur that lived during the
Cretaceous Period, 71-65 million years ago
One of the larger of the
plant-eating dinosaurs, this species stood up to
15 feet tall, was up to 40 feet long, and weighed
up to 7,000 pounds. Its laterally-flattened nasal
structure puts it in the "duck-billed"
family of dinosaurs, and its skeletal structure
suggests that it could easily walk on all four
legs and could likely outrun most predators of
Fossils of this species have
been found across western North America, with
concentrations found in Alberta, Canada, and
eastern Wyoming, in regions that were coasts and
coastal plains during the Cretaceous Period.
The type specimen of Edmontosaurus
annectens was first identified as a separate
species by Othniel Marsh, who called it Claosaurus
annectus, in 1892. The first specimen to be
called Edmontosaurus was found in
southern Alberta, and so named because it was
found in the Edmonton Fossil Beds.
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