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:8/15/2017)... , Aug. 15 2017   ivWatch LLC , a medical ... (IV) therapy, today announced receipt of its ISO 13485 Certification, the ... the International Organization for Standardization (ISO®). ... ivWatch Model 400 Continuous Monitoring device for the early detection ... "This is an important ...
(Date:6/14/2017)...  IBM (NYSE: IBM ) is introducing several innovative ... to developing collaboration between startups and global businesses, taking place ... the event, nine startups will showcase the solutions they have ... France is one ... a 30 percent increase in the number of startups created ...
(Date:5/6/2017)... , May 5, 2017 ... just announced a new breakthrough in biometric authentication ... exploits quantum mechanical properties to perform biometric authentication. These ... smart semiconductor material created by Ram Group and ... finance, entertainment, transportation, supply chains and security. Ram ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... October 10, 2017 , ... San Diego-based team building and cooking events company, ... today. The bold new look is part of a transformation to increase awareness, ... significant growth period. , It will also expand its service offering from its signature ...
(Date:10/10/2017)... Philadelphia, PA (PRWEB) , ... October 10, 2017 ... ... University City Science Center’s FirstHand program has won a US2020 STEM Mentoring Award. ... accept the award for Excellence in Volunteer Experience from US2020. , US2020’s mission ...
(Date:10/10/2017)... , Oct. 10, 2017 International research firm Parks ... Strategy, will speak at the TMA 2017 Annual Meeting , October ... trends in the residential home security market and how smart safety and ... Parks ... "The residential ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... optimization firm for the life sciences and healthcare industries, announces a presentation by ... Francisco. , The presentation, “Automating GxP Validation for Agile Cloud Platforms,” will present ...
Breaking Biology Technology:
Cached News: