New Dinosaurs Discovered

New Dinosaurs Discovered
Scientists at the University of Pennsylvania in Philadelphia and the Utah Geological Survey in Salt Lake City discovered and classified the skeletons of two new species of dinosaurs. Dated to the Early Cretaceous Epoch (approximately 145.5 to 99.6 million years ago), both are beaked herbivorous dinosaurs classified as iguanodonts. The two skeletons were found at different sites in Utah, one near Green River and the other near Arches National Park.
 The hippodraco scutodens skull. (Source: Andrew McDonald)
The hippodraco scutodens skull. (Source: Andrew McDonald)

The first new species of dinosaur is hippodraco scutodens. The first part of the name means “horse dragon,” and the second “shield tooth.” The scientists chose the name because the shape of the skull resembles that of a horse and its tooth crowns look much like oblong shields. The dinosaur also has a shelf of bone extending along the lower jaw parallel to its teeth, something not found in other iguanodonts. Paleontologists recovered nearly the entire skeleton, including the skull, vertebrae, and limbs, although many of the bones were crushed. It is estimated at 15 feet long, although scientists do not think the dinosaur was fully grown when it died, so adult hippodraco dinosaurs may have been larger. The dinosaur discovered in Utah is believed to be approximately 125 million years old.

The second new species is iguanacolossus fortis. The first part of the name means “giant iguana,” while the second part means “mighty.” This redundancy was meant to convey just how large the dinosaur was – 30 feet long, one of the largest iguanodonts ever discovered. Less of this specimen was recovered, but scientists still have portions of the skull, vertebrae, pelvis, and hind legs to study. The distinguishing features of the dinosaur, apart from its size, appears to be an unusual pelvic construction. The age of this dinosaur has not been conclusively determined, but it is believed to be a few million years older than the hippodraco.

TFOT previously reported on other dinosaur news and discoveries including a possible identification of the asteroid that may have killed off the dinosaurs 65 million years ago and an exhibit in Japan that used augmented reality to make visitors feel like they were interacting with three dimensional dinosaurs.

Read more about the two new dinosaurs in this University of Pennsylvania press release. You can also read the full paper describing the dinosaurs and the specific bones recovered and analyzed at the online PLOS One journal.

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About the author

Janice Karin

Janice Karin has a B.A in physics from the University of Chicago and a M.S. in physics from the University of Pennsylvania. In addition to extensive experience as a technical writer focused on development tools, databases, and APIs, Janice has worked as a freelance reporter, editor, and reviewer with contributions to a variety of technology websites. One of her primary focuses has been on PDAs and mobile devices, but she is interested in many other areas of science and technology.

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