Pachyrhinosaurus was a herbivore (plant-eater) that lived in western North America
during the late
between about 72 and 68 million years ago. Its
have been found in
and in Alaska.
Pachyrhinosaurus was about 18 feet (5.5 meters) long, and weighed about
4 tons. Like other
it had a massive head, a neck-frill, and spikes on its neck-frill. However, unlike some of its relatives
it did not have a horn on its snout, but instead had a massive flattened bony lump ("boss").
Scientists believe that it probably
used this boss in butting and shoving matches in a similar way to musk oxen do today.
Pachyrhinosaurus was a member of the Ornithischia ("bird-hipped") order of dinosaurs. What this means, is that although Pachyrhinosaurus was not closely related to birds, it did have similarly shaped pelvic bones.
Pachyrhinosaurus was a Ceratopsian - a member of a group of related herbivorous (plant-eating) dinosaurs with beaks, many of which had neck frills and horns as well.
Pachyrhinosaurus lived between about 72 million years ago and 68 million years ago, during the late Cretaceous period.
Pachyrhinosaurus lived in North America. Its fossils have been found in Alberta, Canada, and in Alaska.
Pachyrhinosaurus was a herbivore (plant-eater).
Pachyrhinosaurus was about 18 feet (5.5 meters) long.
Pachyrhinosaurus weighed about 4 tons.
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