Navigation Links
Ancient birds flew on all-fours

The earliest known ancestor of modern-day birds took to the skies by gliding from trees using primitive feathered wings on their arms and legs, according to new research by a University of Calgary paleontologist. In a paper published in the journal Paleobiology, Department of Biological Sciences PhD student Nick Longrich challenges the idea that birds began flying by taking off from the ground while running and shows that the dinosaur-like bird Archaeopteryx soared using wing-like feathers on all of its limbs.

"The discussions about the origins of avian flight have been dominated by the so-called 'ground up' and 'trees down' hypotheses," Longrich said. "This paper puts forward some of the strongest evidence yet that birds descended from arboreal parachuters and gliders, similar to modern flying squirrels."

The first fossil of the Jurassic-era dinosaur Archaeopteryx lithographica was discovered in Germany in 1861, two years after Charles Darwin published his theory of evolution in On The Origin of Species. Since then, eight additional specimens have been unearthed and Archaeopteryx is considered the best evidence that birds evolved from dinosaurs since it had both feathers and a bird-like wishbone, along with classic reptilian features of a long bony tail, claws and teeth.

Although scientists immediately noticed feather-like structures on the hind limbs, they were dismissed as insulating body feathers that didn't play a role in the animal's flight. It wasn't until several four-winged dinosaurs in China were described in 2002 that researchers began to re-examine Archaeopteryx's legs.

"The idea of a multi-winged Archaeopteryx has been around for more than a century, but it hasn't received much attention," Longrich said. "I believe one reason for this is that people tend to see what they want or expect to see. Everybody knows that birds don't have four wings, so we overlooked them even when they were right under our noses."

Under the supervision of professor Anthony Russell, Longrich examined Archaeopteryx fossils and determined that the dinosaur's leg feathers have an aerodynamic structure that imply its rear limbs likely acted as lift-generating "winglets" that played a significant role in flight.


'"/>

Source:University of Calgary


Related biology news :

1. Ancient olfaction protein is shared by many bugs, offering new pest control target
2. Ancient immune defense mechanism is no match for HIV-1
3. Ancient DNA helps clarify the origins of two extinct New World horse species
4. Researchers Discover Ancient Origins Of Tuberculosis-causing Bacteria
5. Ancient DNA confirms single origin of Malagasy primates
6. Ancient anthropoid origins discovered in Africa
7. Ancient trans-Atlantic swarm brought locusts to the New World
8. Ancient humans brought bottle gourds to the Americas from Asia
9. Ancient DNA helps UF researchers unearth potential hemophilia therapy
10. Ancient DNA provides clues to the evolution of social behavior
11. Ancient ants arose 140-168 million years ago
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/24/2017)... April 24, 2017 Janice Kephart ... with  Identity Strategy Partners, LLP (IdSP) , today ... without President Trump,s March 6, 2017 Executive ... , refugee vetting can be instilled with greater confidence, ... now, all refugee applications are suspended by until ...
(Date:4/13/2017)... India , April 13, 2017 According to ... Proofing, Identity Authentication, Identity Analytics, Identity Administration, and Authorization), Service, Authentication Type, ... MarketsandMarkets™, the IAM Market is expected to grow from USD 14.30 Billion ... Growth Rate (CAGR) of 17.3%. ... MarketsandMarkets ...
(Date:4/6/2017)... April 6, 2017 Forecasts by ... Document Readers, by End-Use (Transportation & Logistics, Government & ... Gas & Fossil Generation Facility, Nuclear Power), Industrial, Retail, ... Are you looking for a definitive report ... ...
Breaking Biology News(10 mins):
(Date:6/22/2017)... ... June 22, 2017 , ... Ovation Fertility supports the ... disease, bringing new hope for prospective parents who are challenged with costs of ... the World Health Organization’s designation in hopes of changing the way health insurers, ...
(Date:6/22/2017)... ... June 22, 2017 , ... Charm Sciences, Inc. is pleased to ... was determined to be appropriate as a screening test at dairies and farms for ... EZ system, and the Charm EZ Lite system. These systems are a combination incubator ...
(Date:6/20/2017)... ... June 20, 2017 , ... ... a well-versed leader with extensive assay development and biomarker expertise, as VP of ... a Boston CRO specializing in bio-analytical assay development and sample testing services. The ...
(Date:6/19/2017)... King of Prussia, PA (PRWEB) , ... June 19, 2017 , ... ... by life sciences companies for over 50 years. One of the biggest challenges faced ... environment. Joining the firm’s regulatory affairs services team is Kati Abraham , who ...
Breaking Biology Technology: