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Since 1979, Colorado's Dry Mesa quarry has provided scientists with some of the world's largest known dinosaur bones, attributed to as-yet-unclassified animals called "supersaurus" and "ultrasaurus," which were oversized members of the sauropod dinosaurs. Lumbering vegetarians that walked on all fours, the sauropods included the well-known Apatosaurus, popularly called Brontosaurus. While the quarry is renowned for its large sauropods, one researcher recently identified a tiny jaw fragment at Dry Mesa that he believes belonged to a baby sauropod. Worldwide, paleotologists have uncovered few fossils of baby sauropods, and this is the first reported from North America.

Only about 3.5 centimeters tall, this fragment comes from the front part of an upper jaw and contains four teeth, which are the key to identifying the animals, says Brooks B. Britt from the Tyrrell Museum of Palaeontology in Drumheller, Alberta, who is studying the fossil. According to Britt, characteristic grooves in the enamel of the teeth show the animal belonged to the sauropods, and was most likely a camarasaur.
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Title Annotation:baby sauropod jaw fragment found
Author:Monastersky, Richard
Publication:Science News
Date:Oct 29, 1988
Previous Article:Holzmaden's clues to ancient birth.
Next Article:Early dinosaurs found in Argentina.

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