Navigation Links
Not the end of the world: Why Earth's greatest mass extinction was the making of modern mammals
Date:8/28/2013

The first mammals arose in the Triassic period, over 225 million years ago. These early furballs include small shrew-like animals such as Morganucodon from England, Megazostrodon from South Africa, and Bienotherium from China.

They had differentiated teeth (incisors, canines, molars) and large brains and were probably warm-blooded and covered in fur all characteristics that make them stand apart from their reptile ancestors, and which contribute to their huge success today.

However, new research from the University of Lincoln, the National Museum in Bloemfontein, South Africa, and the University of Bristol suggests that this array of unique features arose step-wise over a long span of time, and that the first mammals may have arisen as a result of the end-Permian mass extinction which wiped out 90 per cent of marine organisms and 70 per cent of terrestrial species.

Dr Marcello Ruta of the University of Lincoln, lead author of the study, said: "Mass extinctions are seen as entirely negative. However, in this case, cynodont therapsids, which included a very small number of species before the extinction, really took off afterwards and was able to adapt to fill many very different niches in the Triassic from carnivores to herbivores."

Co-author Dr Jennifer Botha-Brink of the National Museum in Bloemfontein, South Africa said: "During the Triassic, the cynodonts split into two groups, the cynognathians and the probainognathians. The first were mainly plant-eaters, the second mainly flesh-eaters, and the two groups seemed to rise and fall at random, first one expanding, and then the other. In the end, the probainognathians became the most diverse and most varied in adaptations, and they gave rise to the first mammals some 25 million years after the mass extinction."

Co-author Professor Michael Benton of the University of Bristol said: "We saw that when a major group, such as cynodonts, diversifies it
'/>"/>

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

Page: 1 2

Related biology news :

1. Water resources management and policy in a changing world: Where do we go from here?
2. Entering an Unseen World: A Founding Laboratory and Origins of Modern Cell Biology 1910-1974
3. Research unearths new dinosaur species
4. Geosphere features top geoscience technology, including LiDAR, EarthScope, CHIRP, ALSM, and IODP
5. Chapman University unearths data in animal habitat selection that counters current convention
6. WHOI researchers, collaborators receive $1.4 million grant to study life in oceans greatest depths
7. Pollen can protect mahogany from extinction
8. Global effort launched to save turtles from extinction
9. First mass extinction linked to marine anoxia
10. University of Toronto biologists predict extinction for organisms with poor quality genes
11. 24 new species of lizards discovered on Caribbean islands are close to extinction
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/19/2014)... a newly discovered hadrosaur with a truly ... Rhinorex condrupus by paleontologists from North Carolina ... what is now Utah approximately 75 million years ... which translates roughly into "King Nose," was a ... hadrosaurs like Parasaurolophus and Edmontosaurus. Hadrosaurs are usually ...
(Date:9/19/2014)... new resource unveiled today by researchers from several ... Dublin provides both experienced and aspiring researchers with ... and operate robots made from soft, flexible materials. ... laser cutters, and other advances in manufacturing technology, ... field. Using principles drawn from conventional rigid robot ...
(Date:9/19/2014)... will study the unique bioelectric signaling system of the ... health. The OU researcher is working to understand ... the signals used to map the world around them. ... of 500-600 discharges a second throughout their lives. ... extreme, but necessary for survival. , "There is evidence ...
Breaking Biology News(10 mins):New hadrosaur noses into spotlight 2Soft robotics 'toolkit' features everything a robot-maker needs 2
... The International Institute for Species Exploration at Arizona State ... responsible for species exploration and classification today announce ... On the list are a pea-sized seahorse, caffeine-free coffee ... new species also include the very tiny (a snake ...
... decimated shellfish populations in many of the world,s ... by Whitman Miller, ecologist at the Smithsonian Environmental ... serious threat to these valuable filter feedersrising levels ... acidification of open ocean, coastal and estuarine waters. ...
... in Texas, more than two million homes were without ... others looking for ways to entertain children, a move ... at The University of Texas Health Science Center at ... carbon monoxide poisoning caused by gasoline-powered electrical generators were ...
Cached Biology News:Scientists announce top 10 new species, issue SOS 2Scientists announce top 10 new species, issue SOS 3Scientists announce top 10 new species, issue SOS 4Scientists announce top 10 new species, issue SOS 5Shellfish face an uncertain future in a high CO2 world 2Shellfish face an uncertain future in a high CO2 world 3Pediatric carbon monoxide poisoning linked to video games after Hurricane Ike 2
(Date:9/19/2014)... Sept. 19, 2014  InterMune, Inc. (Nasdaq: ... Memorandum of Understanding to settle the litigation in the ... Plan of Merger dated as of August 22, 2014, ... Inc.  As one term of the Memorandum of Understanding, ... forth in the attached exhibit reflecting the amendment to ...
(Date:9/19/2014)... crop yields to disease risks, the biological characteristics people ... Just as for heightthe textbook example of a complex ... shaped by multiple genetic and environmental influences, making it ... such genes, geneticists typically mate two individuals that differ ... small mouseand then study their descendents, looking for genes ...
(Date:9/19/2014)... September 18, 2014 Scientists at NYU Langone Medical ... the efficiency of the process for turning adult cells ... compounds, including vitamin C. Using the new technique in ... obtained from adult skin cells by more than 20-fold ... is efficient and reliable, and thus should generally accelerate ...
(Date:9/19/2014)... use light, rather than electricity, to move data ... efficiency is a growing concern as chips, transistor ... of optical circuits light emitters, modulators, and ... One promising light source for optical chips is ... when deposited as a single, atom-thick layer. Other ...
Breaking Biology Technology:InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 2InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 3InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 4InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 5InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 6InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 7InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 8InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 9InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 10InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 11InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 12InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 13InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 14InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 15InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 16InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 17InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 18InterMune Reports Memorandum of Understanding in Connection with Consolidated Delaware Action 19Want to link genes to complex traits? Start with more diversity 2NYU Langone scientists report reliable and highly efficient method for making stem cells 2NYU Langone scientists report reliable and highly efficient method for making stem cells 3Toward optical chips 2Toward optical chips 3
... 19 New long-term data from two pivotal, Phase ... arthritis (RA) receiving SIMPONI (TM) (golimumab) every four ... physical function response through one year. These new ... of Rheumatology (ACR) Annual Scientific Meeting. , "New data ...
... , QUEBEC CITY, Oct. 19 /PRNewswire-FirstCall/ - AEterna ... (the "Company"), a global biopharmaceutical company focused on ... has initiated activities intended to complete the clinical ... ghrelin agonist compound macimorelin (AEZS-130) which could be ...
... Holdings, Inc. ("Cellu Tissue") today announced that it has filed a ... Commission (the "SEC") relating to a proposed initial public offering of ... shares to be sold by Cellu Tissue and shares to be ... shares to be offered, the allocation of shares to be sold ...
Cached Biology Technology:New SIMPONI(TM) Data Show Long-Term Efficacy in Treatment of Rheumatoid Arthritis 2New SIMPONI(TM) Data Show Long-Term Efficacy in Treatment of Rheumatoid Arthritis 3New SIMPONI(TM) Data Show Long-Term Efficacy in Treatment of Rheumatoid Arthritis 4New SIMPONI(TM) Data Show Long-Term Efficacy in Treatment of Rheumatoid Arthritis 5New SIMPONI(TM) Data Show Long-Term Efficacy in Treatment of Rheumatoid Arthritis 6New SIMPONI(TM) Data Show Long-Term Efficacy in Treatment of Rheumatoid Arthritis 7New SIMPONI(TM) Data Show Long-Term Efficacy in Treatment of Rheumatoid Arthritis 8New SIMPONI(TM) Data Show Long-Term Efficacy in Treatment of Rheumatoid Arthritis 9New SIMPONI(TM) Data Show Long-Term Efficacy in Treatment of Rheumatoid Arthritis 10AEterna Zentaris to Complete Phase 3 Clinical Trial of Macimorelin (AEZS-130) as First Oral Diagnostic Test for Growth Hormone Deficiency 2AEterna Zentaris to Complete Phase 3 Clinical Trial of Macimorelin (AEZS-130) as First Oral Diagnostic Test for Growth Hormone Deficiency 3Cellu Tissue Holdings, Inc. Files Registration Statement for Proposed Initial Public Offering of Common Stock 2
When added to either StemSep CD4+ or CD8+ T Cell Enrichment cocktails, human CD69 TAC is designed to deplete human CD69 from samples to isolate resting CD4+ or CD8+ T cells....
This bispecific antibody complex has been tested for efficient depletion of CD41+ cells using the StemSep ; negative immunomagnetic cell separation system....
... a modular confocal system that gives you ... and lightweight design. The improved scan head ... to 400nm andits bi-directional scanner provides faster ... and Y scan axes rotation and new ...
... is an integrated digital microscope and camera ... equipment setup, optical adjustment or software installation. ... technology, COOLSCOPE combines simplicity and advanced technology ... offers simultaneous viewing of a macro image ...
Biology Products: