Dinosaurs' large noses may have been key to physiological processes

National Science Foundation-funded research redefines the extinct creatures' appearance

With only bones for clues, scientists continue to puzzle over many details of dinosaur appearances and physiology. Detective work by a paleontologist at Ohio University now indicates that the creatures' fleshy nasal passages were larger than had been thought, which could lead to more-realistic depictions and greater understanding of their respiratory functions.

In the August 3 issue of the journal Science, National Science Foundation (NSF)-supported researcher Lawrence Witmer reveals that nostrils on many dinosaurs were much farther from the eyes and closer to the mouths than previously depicted. By comparing tell-tale markings on bones from their present-day relatives, he has shown that many dinosaurs had large nasal passages that might have been important for heat exchange and other key physiological processes.

Witmer is an associate professor of biomedical sciences and an anatomist in the university's College of Osteopathic Medicine. X-ray examinations of skulls from more than 65 surviving dinosaur relatives -- including crocodiles, birds and lizards -- helped him infer the probable location of cartilage, blood vessels and other soft tissues that made up the extinct creatures' nasal cavities.

He discovered that nearly all animals share these traits, which gives weight to his assertion that previous depictions of dinosaur nostrils were inaccurate.

"Our findings were consistent, even in turtles and mammals," Witmer said. "We saw an unusual commonality of how the nasal components relate and are positioned. It turns out that the nostril positioning applies to almost all animals."

As a result, scientists may have to change the conventional view of dinosaur nostrils, which have until now been based on the placement of cranial cavities near the eye sockets. Witmer found the largest nasal passages in horned dinosaur

Contact: Tom Garritano
National Science Foundation

Page: 1 2

Related biology news :

1. Climate change plus human pressure caused large mammal extinctions in late Pleistocene
2. Pacific Northwest team unveils largest virus proteome to date
3. Modest climate change could lead to substantially more and larger fires
4. Researchers uncover surprising degree of large-scale variation in the human genome
5. Calcium supplements associated with decreased risk of large bowel polyps
6. Small RNA surmounts large cancer problem
7. Worlds largest scientific society convenes regional meeting June 2-4 in Indianapolis
8. Scientists identify six genes associated with survival in diffuse large B cell lymphoma
9. Worlds largest tiger reserve declared in Myanmar
10. First large-scale trial of genetically personalised treatment for breast cancer to start soon
11. Wasps brains enlarge as they perform more demanding jobs

Post Your Comments:

(Date:7/18/2020)... ... 2020 , ... A study has been published in the ... noise control device to attenuate typical noises in a simulated neonatal intensive care ... sounds from patient monitors, ventilators and other bedside devices that would affect the ...
(Date:7/10/2020)... ... July 09, 2020 , ... Today CJ BIO announced the ... share insight on the “fifth taste” phenomenon that is revolutionizing ingredient mixes, nutritional content ... will be live on Monday, July 13, 2020 at11:00 AM (CDT) during SHIFT20, the ...
(Date:7/2/2020)... ... July 02, 2020 , ... ... B.V. (MBS) has announced a publication detailing the use of its revolutionary ... polymerase chain reaction (RT-PCR) in 16 minutes. The article, titled "Ultra-fast one-step ...
Breaking Biology News(10 mins):
(Date:7/10/2020)... (PRWEB) , ... July 09, ... ... biotechnology company, announced today that Massachusetts Institute of Technology (MIT) has expanded ... broader license allows PathSensors to move into the point-of-care diagnostic market, focusing ...
(Date:7/1/2020)... N.C. (PRWEB) , ... June 29, 2020 , ... ... reported year to date growth of 40% in 2020, despite many obstacles created ... technology, MedShift aims to increase revenue for its partnered medical practices and medical ...
(Date:6/28/2020)... ... June 25, 2020 , ... Lumeda Inc. ... today announced the company has entered a license agreement with Roswell Park Comprehensive ... globally exclusive rights to Roswell Park intellectual property surrounding a novel medical device ...
(Date:6/23/2020)... ... June 22, 2020 , ... Dracen Pharmaceuticals Inc., ... presented June 22-24 during the American Association for Cancer Research Virtual meeting. One ... the potent, consistent single agent activity in KEAP1 mutant tumor models of NSCLC. ...
Breaking Biology Technology:
Cached News: