Navigation Links
Reptile 'cousins' shed new light on end-Permian extinction
Date:5/5/2011

An international team of researchers studied the parareptiles, a diverse group of bizarre-looking terrestrial vertebrates which varied in shape and size. Some were small, slender, agile and lizard-like creatures, while others attained the size of rhinos; many had knobbly ornaments, fringes, and bony spikes on their skulls.

The researchers found that, surprisingly, parareptiles were not hit much harder by the end-Permian extinction than at any other point in their 90 million-year history.

Furthermore, the group as a whole declined and diversified time and time again throughout its history, and it was not until about 50 million years after the end-Permian crisis that the parareptiles finally disappeared.

During the end-Permian extinction, some 250 million years ago, entire groups of animals and plants either vanished altogether or decreased significantly in numbers, and the recovery of the survivors was at times slow and prolonged before new radiations took place.

By studying the fossil record, palaeontologists can examine how individual groups of organisms responded to the end-Permian event and assess just how dramatic it was. However, as the quality and completeness of the fossil record varies considerably, both geographically and stratigraphically, palaeontologists need to find a way to 'join the dots' and piece together the fragments of a complex mosaic to give a more satisfactory and better picture of ancient life's diversity.

The team led by Dr Marcello Ruta of Bristol's School of Earth Sciences, and including scientists from Germany, Brazil and North America, used the evolutionary relationships among known parareptiles to produce a corrected estimate of changing diversity through time.

Dr Marcello Ruta said: "Evolutionary relationships can be superimposed on a time scale, allowing you to infer missing portions of past diversity. They are powerful tools that complement and refine the known reco
'/>"/>

Contact: Hannah Johnson
hannah.johnson@bristol.ac.uk
44-117-928-8896
University of Bristol
Source:Eurekalert

Page: 1 2

Related biology news :

1. Rare 95 million-year-old flying reptile Aetodactylus halli is new pterosaur genus, species
2. Ice-age reptile extinctions provide a glimpse of likely responses to human-caused climate change
3. New species of flying reptile identified on B.C. coast
4. Rare 89 million-year-old flying reptile fossil from Texas may be worlds oldest Pteranodon
5. The pain of evolution: A big toothache for reptiles
6. Gene studies lead to kissing cousins
7. Too many relatives ruining your picnic? Be glad the flies dont invite their cousins
8. October 2008 GEOLOGY and GSA TODAY media highlights
9. Agricultural research highlighted in Houston
10. Atomic-resolution views suggest function of enzyme that regulates light-detecting signals in eye
11. Can genetic information be controlled by light?
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/3/2014)... Dec. 2, 2014   Marvin Test Solutions ... test solutions for military, aerospace, and manufacturing organizations, ... its successful TS-900 PXI semiconductor test platform ... of high-end systems to customers at a fraction ... to traditional ATE. "Our semiconductor ...
(Date:11/21/2014)... Wash. , Nov. 20, 2014 C-Labs ... for the Internet of Things (IoT), today announced the ... of chief operating officer. Previously a strategic advisor to ... finance, and operations. Mr. Traynor is based out of ... . He reports to Chris Muench , Chief ...
(Date:11/18/2014)... , Nov. 18, 2014   EyeLock ... authentication solutions, and MorphoTrust USA (Safran), ... services, today announced a strategic partnership to offer ... motor vehicle administration (MVA), airport screening and financial ... identity-related solutions, MorphoTrust serves consumers through a nationwide ...
Breaking Biology News(10 mins):Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 2Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 3C-Labs Names Former Microsoft and Bsquare Executive as Chief Operating Officer 2EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 2EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 3
... A molecule that helps the body's motor nerve cells ... a major role in inhibiting spinal-cord neurons from regenerating ... found. In cultured cells, the researchers found that a ... stabilizes long nerve fibers in adult vertebrates ?chemically blocks ...
... researchers first to report function of tunneling nanotubules , ... an extensive network of tiny tunnels that, like a ... signals to distant cells. This surprising discovery, being reported ... in the September issue of the journal Immunity, may ...
... seeking ways to eliminate pollution from waterways with microbes ... freshwater ponds can generate electricity. They present their findings ... Society for Microbiology. , "The bacteria are capable of ... to operate small electronic devices. As long as the ...
Cached Biology News:Researchers find molecule that inhibits regrowth of spinal nerve cells 2Researchers find molecule that inhibits regrowth of spinal nerve cells 3'Underground' tunnels discovered as means for communication between immune system cells 2'Underground' tunnels discovered as means for communication between immune system cells 3'Underground' tunnels discovered as means for communication between immune system cells 4Pollution-eating bacteria produce electricity 2
(Date:12/19/2014)... LayerBio is an MIT spin-off developing novel ... National Eye Institute (NEI) at the National Institutes of ... grant to develop a drug-eluting intraocular lens (IOL) for ... of vision loss in people over age 40 and ... Ken Mandell, LayerBio’s Founder and CEO, "There is a ...
(Date:12/19/2014)... In contrast to traditional LED lights where the ... uses proprietary LED technology to incorporate their spectra in ... is critical in low proximity installations. The Valoya L-series ... lifetime which is up to four times longer than ... cost was clearly higher when compared to traditional fluorescent ...
(Date:12/19/2014)... Egenix, Inc. is pleased to announce that Lionel Goldfrank ... succeed Donald Fresne ; Mr. Fresne has also resigned ... of the Board.  In recognition of the many contributions and ... twenty years, the Board designated Mr. Fresne as Chairman Emeritus. ... Search Committee to find a suitable replacement with Biotech industry ...
(Date:12/17/2014)... Based on the revenues gained ... market is dominated by four major players contributing ... These players include GE Healthcare (U.K.), Siemens AG ... , Full Report Copy at http://www.marketsandmarkets.com/Market-Reports/surgical-imaging-market-210534462.html ... be attributed to its strong product portfolio, which ...
Breaking Biology Technology:LayerBio Awarded NIH Grant to Develop a Drug Delivery Device for Cataract Surgery 2Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 2Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 3Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 4
... (Nasdaq: VRUS ), a clinical stage pharmaceutical ... to treat viral infections, reported financial results and operational ... Financial Results Revenues were $1.9 million during the ... for the quarter ended March 31, 2008 and reflect ...
... Iceland, May 11 deCODE genetics,(Nasdaq: DCGN ) ... March 31, 2009. A conference call to discuss these ... webcast live tomorrow,Tuesday, May 12, at 8:00am Eastern Daylight ... Net loss for the quarter ended ...
... MOUNTAIN VIEW, Calif., May 11 VIVUS, Inc. (Nasdaq: ... and commercialization of novel therapeutic products, today reported its highlights and ... First Quarter 2009 Highlights: , ... European Patent for Qnexa - In January 2009, we announced ...
Cached Biology Technology:Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 2Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 3Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 4Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 5Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 6Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 7Pharmasset Reports Fiscal Second Quarter 2009 Financial Results 8deCODE genetics Announces First Quarter 2009 Financial Results 2deCODE genetics Announces First Quarter 2009 Financial Results 3deCODE genetics Announces First Quarter 2009 Financial Results 4deCODE genetics Announces First Quarter 2009 Financial Results 5deCODE genetics Announces First Quarter 2009 Financial Results 6deCODE genetics Announces First Quarter 2009 Financial Results 7deCODE genetics Announces First Quarter 2009 Financial Results 8VIVUS Reports First Quarter 2009 Financial Results and Highlights 2VIVUS Reports First Quarter 2009 Financial Results and Highlights 3VIVUS Reports First Quarter 2009 Financial Results and Highlights 4VIVUS Reports First Quarter 2009 Financial Results and Highlights 5VIVUS Reports First Quarter 2009 Financial Results and Highlights 6VIVUS Reports First Quarter 2009 Financial Results and Highlights 7
... siRNA library screening, optimal siRNA ... and verified for each cell ... siRNA Transfection Optimization Kit, which ... transfection conditions in 96 well ...
... Series of positioning slides offers multiple ... leadscrew, micrometer, and manual. With this ... cost-effective multi-axis systems. These slides also ... resolutions down to 10 nanometers, integrated ...
Ethylene glycol-bis(2-aminoethyl ether)-N,N,N',N'-tetraacetic acid, Molecular Biology Grade...
Kit Components: Anti-PARP LumiGLO Chemiluminescent Substrate Immunoblot Blocking Reagent Pyronin Y Reagent Goat Anti-Rabbit IgG, HRP conjugate Double-It Reagent Film Exposure Folders Autor...
Biology Products: