Navigation Links
'Banana-jawed' fossil mammal linked to rare sound-producing skill

."

From previous studies, scientists knew that Thryohyrax, along with numerous other early hyracoid relatives, had an enlarged opening on the inside of its lower jaws. The feature is known as an internal mandibular fenestra.

But knowledge essentially stopped there, Simons said. Part of the problem was that today's hyraxes lack such skeletal features, so they offered little insight, he said. Also, relatively few Thryohyrax fossils had been found for study.

Simons solved the supply problem as he collected fossils at the Fayum site, located about two hours' drive southwest of Cairo. For several decades, Simons visited the site in search of early ape and monkey fossils, as part of his main research focus on the evolution of primates leading up to humans. During these explorations in the "Badlands of Egypt," his group collected enough specimens of Thyrohyrax to allow a systematic analysis of its jaws.

"Paleontologists have known of the internal mandibular fenestra among fossil hyraxes since early last century, but its significance was poorly understood," Simons said.

In order to gain answers, the Duke team measured tooth samples from the newly available fossils.

"We looked first at molar teeth, which are used for grinding food, and found that all of them in our specimens were identical, so we were pretty sure they were from the same species," DeBlieux said. "But only half of the fossils had the inflated jaws. This meant the trait was possessed by only one sex -- but which one? Previous research, he said, suggested such jaw structures likely were found in females.

The researchers then analyzed incisor teeth, located in the front of the jaw and used for biting. In modern hyraxes, males have larger incisors than females. Among the fossils analyzed, measurements showed that those with inflated jaws had larger incisors, DeBlieux said. This observation led the researchers to infer that the animals were males.

But
'"/>

Source:Duke University


Page: 1 2 3 4

Related biology news :

1. Scientists find fossil proof of Egypts ancient climate
2. Oldest fossil human protein ever sequenced
3. Oldest cranial, dental and postcranial fossils of early modern European humans confirmed
4. Researchers find new giant amphibian fossils in Africa
5. Molecular fossils uncover link between viruses and the immune system
6. Evidence of 600-million-year old fungi-algae symbiosis discovered in marine fossils
7. Spider blood found in 20 million year old fossil
8. Space matters: Estimating species diversity in the fossil record
9. Virginia Tech, Nanjing Institute researchers discover half-billion year-old fossils
10. Missing fossil link Dallasaurus found
11. Bugs expose underground carbon traffic system 10 times more important than fossil fuel burning
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Banana jawed fossil mammal linked rare sound producing skill

(Date:9/30/2014)... in German . ... to risky situations such as exposure to predators. Researchers ... in a long-term study on different populations of great ... and ambient temperature. High metabolic rates and low temperatures ... scenarios birds were more likely to approach potential predators. ...
(Date:9/30/2014)... perilous threats in today,s ocean. From overfishing and ... coral ecosystems are disappearing at unprecedented rates around ... corals surrounding the island of Moorea in French ... environment: coral guard-crabs. New research from the National ... Seabird McKeon and the museum,s predoctoral fellow Jenna ...
(Date:9/30/2014)... HONG KONG , Sept. 30, 2014 Winners of ... The Economist Events, Innovation Summit scheduled to take place at the ... At the summit, the award winners will share their experiences and ... people who have made a proven innovation over the past decade, ... the night before the summit. It will be the ...
Breaking Biology News(10 mins):Risky metabolism 2Smithsonian scientists discover coral's best defender against an army of sea stars 2Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 2Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 3Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 4Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 5Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 6Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 7
... OCTOBER 27, 2009 -- Phosphorus is an essential element ... have led to massive eutrophication problems in water bodies ... is at least partly responsible for offshore "dead zones," ... of Mexico. While wetlands often act as filtering or ...
... 2009 -- Worldwide demand for a safe and secure ... forefront of sustainability discussions; however many research programs have ... traditional public or formula grants. Researchers are now turning ... international plant breeding programs. Stakeholders from public and ...
... management experts from across federal science agencies will gather ... identifying research priorities, exploring research performance management, and assessing ... meeting is to develop a collaborative framework to ensure ... in a coordinated manner. "We are bringing ...
Cached Biology News:Expert to discuss phosphorus' impact on Gulf 'dead zone' 2How do we fund plant breeding? 2How do we fund plant breeding? 3
(Date:9/30/2014)... Toronto, Ontario, Canada (PRWEB) September 30, 2014 ... requirements based on 500 square feet. per employee, which included ... different world back then.” says Jeff Howell, partner at ... tenant advisory firm in Toronto. “By the year 2000, ... We are now seeing that number come down to 175 ...
(Date:9/29/2014)... the forefront of diagnostics today, with imaging techniques ... scanning, and NMR (nuclear magnetic resonance) increasing steeply ... of image resolution and quality still limit these ... A solution is hyperpolarization, which involves injecting the ... by following the distribution and fate of specific ...
(Date:9/29/2014)... , Sept. 29, 2014 Research ... "Oligonucleotide Synthesis Market by Product & Services, End-User , ... their offering. The global oligonucleotide synthesis ... from $1,070.7 million in 2014, growing at a CAGR ... synthesis market is categorized on the basis of products ...
(Date:9/29/2014)... batteries are efficient but involve a range of ... (lucerne seed) and pine resin and a clever ... with a highly interesting alternative. Their study will ... ChemSusChem . , ,We think our discovery can ... for the batteries of the future, says Daniel ...
Breaking Biology Technology:ITRA Global Reports on How Companies Are Squeezing More Employees into Less Office Space 2ITRA Global Reports on How Companies Are Squeezing More Employees into Less Office Space 3A safer approach for diagnostic medical imaging 2A safer approach for diagnostic medical imaging 3Oligonucleotide Synthesis (Diagnostics, PCR, QPCR, Gene Synthesis, NGS, DNA, RNAi) Market - Global Forecast to 2019 2Oligonucleotide Synthesis (Diagnostics, PCR, QPCR, Gene Synthesis, NGS, DNA, RNAi) Market - Global Forecast to 2019 3Smart, eco-friendly new battery to solve problems 2
... 11 Cardium Therapeutics,(Amex: CXM ) today ... http://www.anginaresearchstudy.com to provide patients, caregivers and,physicians with ... The AWARE study is evaluating the therapeutic effects ... (insufficient blood flow,within the heart muscle) and associated ...
... (HD) instruments recognized in premier program ... for the medical technology ... Systems,announced that the company,s RealHand High Dexterity (HD) instruments ... design,team did an excellent job thinking ,outside of the ...
... - RDEA119 Produced Significant Beneficial Effect in Animal Models of ... ... Effective Treatment for Gout -, SAN DIEGO, June 11 Ardea Biosciences, ... Company,s,lead mitogen-activated ERK kinase (MEK) inhibitor, RDEA119, demonstrating,its potent activity in animal models ...
Cached Biology Technology:Cardium Launches New AWARE Clinical Study Website 2Cardium Launches New AWARE Clinical Study Website 3Cardium Launches New AWARE Clinical Study Website 4Cardium Launches New AWARE Clinical Study Website 5Cardium Launches New AWARE Clinical Study Website 6Cardium Launches New AWARE Clinical Study Website 7Novare Surgical Wins Medical Design Excellence Award 2Ardea Biosciences Presents Inflammation Program Data for Arthritis and Gout at 2008 Annual European Congress of Rheumatology 2Ardea Biosciences Presents Inflammation Program Data for Arthritis and Gout at 2008 Annual European Congress of Rheumatology 3Ardea Biosciences Presents Inflammation Program Data for Arthritis and Gout at 2008 Annual European Congress of Rheumatology 4Ardea Biosciences Presents Inflammation Program Data for Arthritis and Gout at 2008 Annual European Congress of Rheumatology 5
Recorder REC-111 single-channel, 1. Category: Chromatography Systems & Accessories, Systems....
For the quantitative determination of cyclic AMP (cAMP) concentrations in cell culture supernates, serum, plasma, saliva, urine and cell lysates....
... Wide Range CRYETTE WR Cryoscope for molecular weight determinations for petroleum-based applications. Multiple solvents ... cyclohexanol, sulfolane. ... ... ...
... For the ultimate in utility and ... to meet the needs of the researcher. ... interior dimensions or as sheet material that ... enclosures. These isolators are autoclavable and non-cytotoxic ...
Biology Products: