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Chilantaisaurus (Getty Images)


Chilantaisaurus (Greek for "Chilantai lizard"); pronounced chi-LAN-tie-SORE-us


Woodlands of central Asia

Historical Period:

Middle Cretaceous (110-100 million years ago)

Size and Weight:

About 25 feet long and 3-4 tons



Distinguishing Characteristics:

Large size; relatively long arms


About Chilantaisaurus:

A bewildering array of large theropods roamed the woodlands of Eurasia during the early to middle Cretaceous period; among the biggest of the bunch was Chilantaisaurus, which may have weighed as much as four tons (only about half the size of a full-grown Tyrannosaurus Rex, which lived tens of millions of years later, but still impressive). Chilantaisaurus was once thought to be closely related to the slightly earlier Allosaurus of North America, but it now seems that it may have been an early member of the line of carnivorous dinosaurs that went on to produce the truly gigantic Spinosaurus.

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