bipedal duck-billed dinosaurs (hadrosaurs) of the Late Cretaceous Period, commonly found as fossils in North American rocks 70 million to 65 million ...
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http://www.britannica.com/eb/a-z/a/69
(pronounced uh-NAT-uh-SAWR-us) Anatosaurus (meaning 'duck lizard') is an obsolete name for Edmontosaurus, a duck-billed dinosaur from the Cretaceous period. Anatosaurus was named by Lull and Wright in 1942; the type species is A. annectens. A. longiceps = Anatotitan longiceps.
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http://www.enchantedlearning.com/subjects/dinosaurs/glossary/
Anatosaurus was an amphibian, webbed-hand dinosaur of the Cretaceous period, remains of which were first found in 1942. Anatosaurus was a herbivore, and from extensive remains found including mummified samples with skin connected, we know that it was between 10 and 13 metres long, walked on its hind legs and had forelegs adapted a little like hands...
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http://www.probertencyclopaedia.com/browse/BAA.HTM
Anatosaurus This nomenclature (“duck lizard”) is no longer recognized by scientists because they found that it described an animal that was previously given another name which is Edmontosaurus..
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http://www.wordinfo.info/words/index/info/view_unit/2727/2
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