Printer Friendly

A new horned dinosaur.

A new horned dinosaur

Last century, paleontologists described the first Americandinosaurs from fossil teeth found in Montana's Judith River Formation. Now, this 75-million-year-old formation has yielded another important dinosaur discovery.

Peter Dodson at the University of Pennsylvania in Philadelphiareports in the Dec. 28 PROCEEDINGS OF THE ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA on a new kind of ceratopsid, or horned dinosaur -- the first new North American ceratopsid to be named in 35 years.

According to Dodson, te plant-eating Avaceratops lammersiwas about the size of a boar, weighing about 400 pounds and measuring 7.5 feet long and 3 feet high -- dimensions that are relatively small for a dinosaur. Unlike other, much larger ceratopsids of the time, Avaceratops had a frill -- a bone that projected back from the skull -- that was solid and fan-shaped. The frills of other ceratopsids were pierced by two large openings and curved toward the front of the skull along the midline.

The Avaceratops remains from Judith River include two-thirdsof the skull, all of the lumbs, half of the foot bones and a quarter of the vertebrae and ribs.
COPYRIGHT 1987 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1987, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:Avaceratops lammersi
Publication:Science News
Date:Jan 17, 1987
Previous Article:Muscular dystrophy: defective inhibitor?
Next Article:Spotted vaccine to follow?

Related Articles
Back off veto threat.
Bed liner maker picks up.
He took a leap, now he's FLYING HIGH.
Cynthia Knight joins South Lane.
City gets option to buy 2 Broadway buildings.
Incumbent Hall, newcomer McCown capture LCC seats.

Terms of use | Copyright © 2016 Farlex, Inc. | Feedback | For webmasters