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 The Judith River Formation is a fossil-bearing geologic formation in northern Montana, and is part of the Judith River Group. It dates to the upper Cretaceous. It is an historically important formation, explored by early American paleontologists such as Edward Drinker Cope, who . Now, this 75-million-year-old formation has yielded another important dinosaur discovery. Peter Dodson at the University of Pennsylvania (body, education) University of Pennsylvania - The home of ENIAC and Machiavelli. http://upenn.edu/. Address: Philadelphia, PA, USA. 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 Frills see frilled. of other ceratopsids were pierced by two large openings and curved toward the front of the skull along the midline mid·line n. A medial line, especially the medial line or plane of the body. midline, n the line equidistant from bilateral features of the head. . 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 Vertebrae Bones in the cervical, thoracic, and lumbar regions of the body that make up the vertebral column. Vertebrae have a central foramen (hole), and their superposition makes up the vertebral canal that encloses the spinal cord. and ribs. |
|
||||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion