World's Oldest Known Fossil Reptile Nests Discovered In Arizona's Petrified Forest

ar to be scratch marks from digging activity and egg impressions, although no eggs or eggshells were found.

The fossil record for reptiles began in the Pennsylvanian Period beginning about 300 million years ago, said Hasiotis and Martin. The oldest previous evidence for reptile-nesting sites include 110 million-year-old sea turtle nests from the Front Range of Colorado and nests of a dinosaur group known as Hadrosaurus from Montana, estimated to be about 90 million years old.

Hasiotis first discovered the ancient reptile nests while conducting research in Arizona's Petrified Forest in 1996. He invited Martin to the site in 1997 and the two returned to conduct additional research in 1998. Surrounding some of the ancient nests are broad, shallow pits or irregular, trampled ground that appears to contain vertebrate tracks, Hasiotis said. The researchers also discovered distinct tracks of phytosaurs about one-half mile from the nesting sites.

The walls in the interior of the nests appears to have been compacted down by the inhabitants. Contemporary crocodile mothers tend to stay near their nests and guard them from predators, while turtles leave their nests immediately after the egg-laying process, said Hasiotis.

Some of the fossil nests are located adjacent to each other, said Hasiotis and Martin, who noted that modern crocodilians and sea turtles sometimes dig between five and 10 pits in an area before picking the appropriate place to lay their eggs. The research project was funded by the Petrified Forest Museum Association in Arizona.


Contact: Stephen Hasiotis
University of Colorado at Boulder

Page: 1 2

Related biology news :

1. Worlds largest scientific society convenes regional meeting June 2-4 in Indianapolis
2. Worlds oldest modern hummingbirds described in Science
3. Worlds oldest mouse celebrates milestone birthday
4. Worlds largest tiger reserve declared in Myanmar
5. Worlds first databank for all living systems
6. Worlds largest-ever sea turtle symposium to address plummeting populations of sea turtles
7. Worlds first robot scientist proves a major success in the lab
8. Worlds leading mad cow diagnostic company, responds to USDAs additional BSE protection measures
9. Worlds largest scientific society holds regional meeting in Columbia, Mo.
10. Worlds most alkaline life forms found near Chicago
11. Worlds largest forest birds may produce worlds deepest bird calls

Post Your Comments:

(Date:6/11/2019)... ... June 12, 2019 , ... With a rapidly growing ... leverage the Geneious Biologics platform as a premium hub for bioinformatics and computer ... says: “The Geneious team has done an excellent job accommodating our specific data, ...
(Date:6/6/2019)... ... June 05, 2019 , ... MedTech Breakthrough ... global health and medical technology market, announced that it has selected Medacta International’s ... Solution” award in the 2019 MedTech Breakthrough Awards program. , Medacta® ...
(Date:6/6/2019)... ... June 05, 2019 , ... ... the exclusive financial advisor to Pathologists Bio-Medical Laboratories (PBM) on its recent acquisition ... anatomic pathology platform that provides services to more than one dozen hospitals and ...
Breaking Biology News(10 mins):
(Date:6/11/2019)... ... June 11, 2019 , ... A study released today in ... are able to incorporate into human CD34+ cells, modifying their gene expression and ... increased the cells’ ability to lodge into bone marrow. This research performed by ...
(Date:5/31/2019)... ... 30, 2019 , ... World Compliance Seminars today announced a ... in Boston, MA. This peer recommended interactive workshop is always selected by professionals ... kick off with a compendial treatment of Data Integrity fundamentals. After laying the ...
(Date:5/21/2019)... ... May 21, 2019 , ... DuPont Nutrition & ... the inaugural Africa Brewing Conference dedicated to sharing brewing knowledge, strengthening relationships and ... which is supported through a partnership with “Ethiopia Invest”, will run through May ...
(Date:5/14/2019)... (PRWEB) , ... May 14, 2019 , ... Gateway ... expansion, effectively doubling its space from 2,500 to 5,000 square feet. , “This ... Gender DNA tests ,” says Gateway Genomics CEO, Chris Jacob. “The SneakPeek At-Home test, ...
Breaking Biology Technology:
Cached News: