HOME >> BIOLOGY >> NEWS
Fossil Footprints Show Foot-Movement Similarity In Dinosaurs And Birds

PROVIDENCE, R.I. -- A new study of theropod dinosaur prints shows that foot motions were preserved in three dimensions when the meat eaters slopped through mud 210 million years ago. Although the footprints are similar to those made by birds living today, there are significant differences in the position of the big toe, foot posture and hind limb movement.

"Living birds retain many features from their theropod ancestors, but hind limb anatomy and function did change," said lead scientist Stephen Gatesy, assistant professor of ecology and evolutionary biology at Brown University. "Birds do not move exactly like 210-million-year-old dinosaurs, but they are the closest thing alive today."

Gatesy and colleagues discovered and studied numerous trackways made by human-sized theropod dinosaurs that strode on hind legs across extensive mud flats in what is now Greenland. At the time the dinosaurs roamed, the region was more tropical than arctic.

Editors: Color illustrations are available from the News Bureau and at the News Bureau's Web site.

On firm ground, a theropod's foot produced shallow, three-toed impressions. On sloppier muds, the foot sank deeper and left behind unusually long, four-toed prints. Such deep tracks captured movements of the foot below the surface, preserving a three-dimensional record of locomotor behavior in Triassic-period dinosaurs.

Reporting in Nature, the researchers said that a spectrum of tracks similar to the Greenlandic series is produced when a bird, such as a turkey, walks through muds of different consistencies. In the tracks of both Triassic theropods and living birds, the foot plunged down and forward into the muck. The toes collapsed together below the surface as the entire foot emerged at the front of the track.


'"/>

Contact: Scott Turner
Scott_Turner@Brown.edu
401-863-2476
Brown University
12-May-1999


Page: 1 2 3

Related biology news :

1. Fossil genes reveal how life sheds form and function
2. Fossils reveal direct link between global warming and genetic diversity in wildlife
3. Methane and mini-horses: Fossils reveal effects of global warming
4. Fossil teeth reveal recent origin of human growth pattern
5. Fossil teeth of extinct North American rhinos reveal an aquatic lifestyle similar to modern hippos
6. Fossil plants ties to ancient carbon redefined
7. Fossil mayflies can be used to weigh ancient atmospheres
8. Fossilized Emu Eggshells Give Clues To 65,000 Years Of Vegetation And Climate Changes In Australia
9. Scientists Use Fossilized Emu Eggshells To Discern Changes In Vegetation, Provide Additional Evidence Of Human Impact On Australian Landscape
10. A Missing Link Fossil Adds Foliage To The Early Human Ancestor Family Tree
11. Important New Fossil Animal Discovered By Wits Scientists

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/3/2020)... ... 03, 2020 , ... Accumen Inc. is helping healthcare get ... Spectrum Solutions, to provide COVID-19 saliva testing kits nationally. , “Accumen has ... than 10 years. Early in the COVID-19 crisis, we identified supply chain gaps ...
(Date:7/18/2020)... ... July 16, 2020 , ... ... effectiveness of the Invictus Medical Neoasis™ active noise control device to attenuate typical ... that the Neoasis™ device attenuated the alarm sounds from patient monitors, ventilators and ...
(Date:7/4/2020)... ... July 03, 2020 , ... Aesthetics Biomedical (ABM), a ... awards for not only the products and treatments developed, but also the dedicated ... RF. All the brands built by ABM have received several honors already for ...
Breaking Biology News(10 mins):
(Date:8/7/2020)... ... August 06, 2020 , ... ... industries, announces it has closed on the purchase of greenfield for a new, ... TX and includes over 21 acres in the initial acquisition, with an option ...
(Date:7/31/2020)... ... July 29, 2020 , ... Diversified Technologies, Inc. ... can be configured to drive Klystrons, TWTs, IOTs, and magnetrons. , DTI ... two switches in a push-pull configuration; yielding fast fall time for a capacitive ...
(Date:7/31/2020)... , ... July 30, 2020 ... ... cloud-based software for the life sciences industry, today announced the release of ... designed specifically for Medical Science Liaisons (MSLs) and other field medical professionals. ...
(Date:7/18/2020)... ... , ... dicentra , a leading Contract Research Organization ... pleased to announce that Charles Galea has joined its clinical trials division as ... accomplished and results-driven sales executive with over 10 years of expertise in business ...
Breaking Biology Technology:
Cached News: