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:11/3/2014)... and preterm birth are linked to increased risk for ... the American College of Rheumatology (ACR) journal, Arthritis ... and pre-term babies were not at greater risk of ... According to the ACR, 27 million Americans over the ... of OA range from mild to severe and include ...
(Date:11/2/2014)... NEW ORLEANS, LA (2 November 2014)—In support of a ... the Bill & Melinda Gates Foundation today announced an ... PATH Malaria Vaccine Initiative (MVI) in building new vaccines ... and help realize the "accelerating to zero" agenda. Such ... providing what could be called an "immunological bed net." ...
(Date:11/2/2014)... and bump into a biologist . . . , While ... sketch, researchers have taken this premise and applied it to ... in the rising oceans of genomic data. , In this ... studies are publishing at a dizzying rate. The challenge is ... the noise (and there is no shortage of noise). , ...
Breaking Biology News(10 mins):Preterm, low birth-weight babies may need new hips in adulthood 2New malaria vaccines to prevent infection and block transmission get a shot in the arm 2New malaria vaccines to prevent infection and block transmission get a shot in the arm 3New malaria vaccines to prevent infection and block transmission get a shot in the arm 4Mutant models 2Mutant models 3Mutant models 4
... the molecular details that show how a viral protein ... them to continuously grow, thereby predisposing people to certain ... of the most common human viruses in the world ... Burkitt's lymphoma as well as the epithelial cell cancer, ...
... aimed at directly controlling the expression of genes by turning ... to drugs for the treatment or cure of many diseases, ... disease starts at the level of malfunctioning gene expression, or ... of pharmacology and biochemistry. "This is an approach that could ...
... cells make their vital connections, embryonic cells move to ... in to destroy pathogenic organisms, and cancer cells metastasize, ... migrations didn't know how cells determined where to go. ... a fragment of a protein that senses chemicals that ...
Cached Biology News:U of T researchers map role of Epstein-Barr virus in cancer 2Gene silencing technique offers new strategy for treating, curing disease 2New understanding of cell movement may yield ways to brake cancer's spread 2
(Date:11/27/2014)... Massachusetts, USA (PRWEB) November 26, 2014 ... more accuracy, additive systems to enable 3D manufacture at ... analyzing road conditions are among finalists in nine categories ... . The awards are sponsored by SPIE, the ... Photonics Media . , Winners will be announced by ...
(Date:11/26/2014)... Dallas, Texas (PRWEB) November 26, 2014 ... Bifluoride Industryā€¯ is a professional and in-depth research ... Ammonium Bifluoride information, like its definition, classification, application, ... overview. This report covers the international market analysis, ... (such as the US, Europe, Asia, China, Japan ...
(Date:11/26/2014)... , Nov. 26, 2014 The announced ... indicate the company is looking to expand in non-healthcare ... sales.  The healthcare market research firm says that  Siemens ... Kalorama Information,s biennial survey of the IVD market , ... any change in its composition would likely affect IVD ...
(Date:11/26/2014)... (PRWEB) November 26, 2014 On January, ... the Baltimore and Washington D.C. science community to the ... The event, sponsored by the Protein Society, will take ... University Center, Room 312. Through discussion, presentations and ... structural importance of proteins, their role in the industry ...
Breaking Biology Technology:Finalists Named for 2015 Prism Awards for Photonics Innovation 2Finalists Named for 2015 Prism Awards for Photonics Innovation 3Finalists Named for 2015 Prism Awards for Photonics Innovation 4Finalists Named for 2015 Prism Awards for Photonics Innovation 5Ammonium Bifluoride Market International Analysis of Manufacturing, Technology & Trends Now at ReportsnReports.com 2Ammonium Bifluoride Market International Analysis of Manufacturing, Technology & Trends Now at ReportsnReports.com 3Kalorama: Sale of Three Siemens Healthcare Units Raises Questions About Firm's IVD Future 2
... ... President, Marketing and Sales, and James Carr Promoted To ... Capacity in China -, - Details to be Presented at Investor Briefing Today at 12 p.m. Eastern ... Time -, SOUTH SAN FRANCISCO, Calif., ...
... Ill. A hybrid device combining force and fluorescence ... made possible the accurate detection of nanometer-scale motion of ... resonance energy transfer and an optical trap, we now ... of a biomolecule at an extremely low applied force, ...
... Oct. 11 Timely Data Resources, Inc.,has recently released ... and Therapy,Review (DTR) reports. Reports are available through subscription ... be purchased,individually at marketresearch.com. These reports offer a quick ... Each overview is,generally 10 to 15 pages in length, ...
Cached Biology Technology:Anesiva Outlines Comprehensive Commercialization Plan for FDA Approved Product Zingo(TM) 2Anesiva Outlines Comprehensive Commercialization Plan for FDA Approved Product Zingo(TM) 3Anesiva Outlines Comprehensive Commercialization Plan for FDA Approved Product Zingo(TM) 4Anesiva Outlines Comprehensive Commercialization Plan for FDA Approved Product Zingo(TM) 5Anesiva Outlines Comprehensive Commercialization Plan for FDA Approved Product Zingo(TM) 6Anesiva Outlines Comprehensive Commercialization Plan for FDA Approved Product Zingo(TM) 7New force-fluorescence device measures motion previously undetectable 2New force-fluorescence device measures motion previously undetectable 3