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Kritosaurus (Sergey Krasovskiy)


Kritosaurus (Greek for "separated lizard"); pronounced CRY-toe-SORE-us


Woodlands of North America

Historical Period:

Late Cretaceous (75 million years ago)

Size and Weight:

About 30 feet long and one ton



Distinguishing Characteristics:

Large size; hooked snout


About Kritosaurus:

Like the armored dinosaur Hylaeosaurus, Kritosaurus is more important from a historical than from a paleontological point of view. This hadrosaur was discovered in 1904 by the famous paleontologist Barnum Brown, and an awful lot was inferred about its appearance and behavior based on very limited fossil remains--to the extent that the pendulum has now swung the other way and very few experts talk with any confidence about Kritosaurus. For what it's worth, the type specimen of Kritosaurus may wind up being assigned to a more solidly established genus of hadrosaur, Gryposaurus (In a recent paper, one paleontologist argues that a species of Kritosaurus should properly be assigned to the South American Secernosaurus.)

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