Navigation Links
Prehistoric predators with supersized teeth had beefier arm bones
Date:1/4/2012

oth cats.

"I started noticing this trend," she said.

Long before cats came to be, the earth was home to a number of toothy carnivores that don't exist today. Nimravids were meat eaters that roamed the world for nearly 35 million years, from about 42 to 7 million years ago, alongside another group of extinct predators called the Barbourofelids, which lived for 20 million years until they, too, died out.

"If you saw one of these animals you'd probably think it was a cat, but true cats didn't evolve until millions of years later," Meachen said.

These animals left no living descendants, but thanks to fossilized bones we know their upper canines came in a wide range of shapes and sizes. Some species had canines that were shorter and round in cross section; others were longer, flattened side-to-side, and more oval in cross section. Some were even serrated "like a steak knife," Meachen said.

To find out if sabertooth predators with longer, thinner teeth and more delicate dentition generally had thicker forelimbs, Meachen measured the fossilized arm bones and upper canines of hundreds of museum specimens of extinct cats, nimravids and barbourofelids that once roamed North America.

She also measured the teeth and arm bones of 13 cat species living today such as the tiger and the clouded leopard all of which have conical teeth.

When she compared the dimensions of the teeth to those of the arms, she found that each group of animals gradually converged on the same solution the longer the teeth, the thicker the forelimbs. The results held up even after taking into account the fact that bigger species generally have bigger bones.

She attributes the striking similarities among the species to convergent evolution "The same correlated sets of traits arose repeatedly through time," Meachen said.

"This means that sabertooth cats weren't actually that special in the big scheme of things,"
'/>"/>

Contact: Robin Ann Smith
rsmith@nescent.org
919-668-4544
National Evolutionary Synthesis Center (NESCent)
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Getting warmer? Prehistoric climate can help forecast future changes
2. Male dinosaurs may have been prehistoric babysitters, study shows
3. At 2,500 pounds and 43 feet, prehistoric snake is the largest on record
4. Largest prehistoric snake on record discovered in Colombia
5. Toothsome research: Deducing the diet of a prehistoric hominid
6. Poisonous prehistoric raptor discovered by research team from Kansas and China
7. IUs Carlson among team of scientists announcing new species of prehistoric man
8. Prehistoric fish extinction paved the way for modern vertebrates
9. Prehistoric frogs face extinction
10. New research will unravel Arizonas prehistoric puzzle of the Hohokam ceramic industry
11. Cactus genes connect modern Mexico to its prehistoric past
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Prehistoric predators with supersized teeth had beefier arm bones
(Date:9/23/2014)... Ill. Antarctic fishes that manufacture their own ... Ocean also suffer an unfortunate side effect, researchers ... their bodies resist melting even when temperatures warm. ... Proceedings of the National Academy of Sciences ... an undesirable consequence of the evolution of antifreeze ...
(Date:9/23/2014)... man has domesticated animals, selecting the best traits ... offer an intriguing animal to examine adaptation to ... of selected breeding and a wealth of livestock ... kind study that combined molecular and environmental data, ... for genes under environmental selection from domesticated sheep ...
(Date:9/23/2014)... an athlete,s moving body relies on an orchestrated response of ... intersecting planes literally the geometry of a critical ... more than just a footfall error at the root of ... or anterior cruciate ligament tear. In fact, size of ... knee joint and volume of the ACL combine to ...
Breaking Biology News(10 mins):Study: Antifreeze proteins in Antarctic fishes prevent freezing ... and melting 2Study: Antifreeze proteins in Antarctic fishes prevent freezing ... and melting 3Being sheepish about climate adaptation 2Does size matter? MRI imaging sheds light on athletes most at risk for severe knee injury 2Does size matter? MRI imaging sheds light on athletes most at risk for severe knee injury 3
... is allowing scientists to better understand the movement of cells ... microenvironment. In a recent article published in Disease Models ... colleagues used optimized methods of laser microscopy to track the ... cancer. As a tumor grows, it triggers ...
... Activity in Identity ... Management and Biometrics, FALLS CHURCH, Va., Sept. ... relocating the CSC Identity Labs headquarters from Camp,Hill, Pa., to Fairmont, ... alignment with the federal government,s presence in the,I-79 High Technology Corridor, ...
... FL (September 16, 2008)- A team of scientists headed by neuroscientist ... grant by the National Institute of Health (NIH), to develop a ... injury. Dr. Chiba, a professor at the University of Miami,s Department ... groundbreaking process to enhance synapse formation or nerve regeneration., ...
Cached Biology News:CSC Identity Labs Headquarters Relocates to West Virginia 2CSC Identity Labs Headquarters Relocates to West Virginia 3NIH EUREKA grant awarded to University of Miami scientist 2
(Date:9/23/2014)... WASHINGTON, D.C., September 23, 2014Researchers from the University ... demonstrated a new method to improve the reliability ... carbon nanotubes (CNT), a semiconductor material that has ... the most promising successors to silicon for smaller, ... in a new paper published in the journal ...
(Date:9/23/2014)... of researchers from the University of Southampton,s Optoelectronics ... to fabricate a potential challenger to graphene. , ... a honeycomb lattice, is increasingly being used in ... switches and light sources, thanks to the unprecedented ... thermal conductivity and mechanically stretchable yet harder than ...
(Date:9/23/2014)... potential uses as ferroelectrics, fast ion conductors, and ... a great deal of scientific interest on the ... , "The interfaces separating the different crystalline regions ... the material as a whole," said Pratik Dholabhai, ... project. "It is in the chemical makeup of ...
(Date:9/23/2014)... YORK , Sept. 23, 2014 ... part of the biomaterial family and are increasingly ... with body fluids and tissues without having a ... extensively used as tissue replacement and tissue repair ... from materials such as ceramics, glass, glass-ceramics, and ...
Breaking Biology Technology:Future flexible electronics based on carbon nanotubes 2Future flexible electronics based on carbon nanotubes 3Future flexible electronics based on carbon nanotubes 4Southampton scientists grow a new challenger to graphene 2Los Alamos researchers uncover properties in nanocomposite oxide ceramics for reactor fuel 2Global Bioactive Material Market 2014-2018 2
... , , ... ("China Pharma") (NYSE Amex: CPHI ), which develops,manufactures, and ... present at the Brean Murray, Carret & Co. 2009 China,Growth ... Broadway,hotel in New York. Management is scheduled to present ...
... , CRACKS AMAZON.COM BEST SELLER LIST IN SCIENCE ... top ten best selling science books , SEATTLE, Nov. 17 ... new book about the controversial theory of intelligent design made Amazon.com,s ... as the world marks 150 years since Charles Darwin published his ...
... , KVISTGARD, ... today that BARDA (Biomedical Advanced Research and,Development Authority) has ... of a freeze-dried version of its IMVAMUNE(R) smallpox vaccine,with ... The contract provides funds to ...
Cached Biology Technology:China Pharma Holdings, Inc. to Present at Brean Murray China Growth Conference 2Intelligent Design Book Delivers Blow to Darwin 2US Government Awards Contract to Bavarian Nordic for the Development of Freeze-Dried IMVAMUNE(R) Smallpox Vaccine 2US Government Awards Contract to Bavarian Nordic for the Development of Freeze-Dried IMVAMUNE(R) Smallpox Vaccine 3
... AmpliTaq DNA Polymerase is the most thoroughly ... a testimony to its overall utility and ... it ideal for PCR applications. , ... results. ,, AmpliTaq DNA Polymerase is ...
... DNA Polymerase is a versatile and easy-to ... PCR applications. GCpro Taq DNA Polymerase is ... E. coli, containing the DNA polymerase I ... a highly processive 5'-3' DNA polymerase activity. ...
Taq DNA Polymerase (cloned), 250 units. Category: Nucleotides & Enzymes & Biochemicals, Modifying Enzymes, Polymerases....
APO(a) EIA Sample Size: 25 l...
Biology Products: