Navigation Links
Fossil discovery represents new milestone in early mammal evolution
Date:8/25/2011

A well-preserved fossil discovered in northeast China provides new information about the earliest ancestors of most of today's mammal species--the placental mammals.

According to a paper published today in the journal Nature, the fossil represents a new milestone in mammal evolution that was reached 35 million years earlier than previously thought.

It fills an important gap in the fossil record and helps to calibrate modern, DNA-based methods of dating evolution.

The paper, by a team of scientists led by Carnegie Museum of Natural History paleontologist Zhe-Xi Luo, describes Juramaia sinensis, a small shrew-like mammal that lived in China 160 million years ago during the Jurassic.

Juramaia is the earliest known fossil of eutherians--the group that evolved to include all placental mammals, which provide nourishment to unborn young via a placenta.

As the earliest known fossil ancestor to placental mammals, Juramaia provides fossil evidence of the date when eutherian mammals diverged from other mammals: metatherians (whose descendants include marsupials such as kangaroos) and monotremes (such as the platypus).

As Luo explains, "Juramaia, from 160 million years ago, is either a great-grand-aunt or a great-grandmother of all placental mammals that are thriving today."

The fossil of Juramaia sinensis was discovered in the Liaoning Province in northeast China and examined in Beijing by Luo and collaborators: Chong-Xi Yuan and Qiang Ji from the Chinese Academy of Geological Sciences and Qing-Jin Meng from the Beijing Museum of Natural History, where the fossil is stored.

The name Juramaia sinensis means "Jurassic mother from China."

The fossil has an incomplete skull, part of the skeleton, and, remarkably, impressions of residual soft tissues such as hair.

Juramaia's complete teeth and forepaw bones enable paleontologists to pinpoint that it is closer to living placental
'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Europe rallies behind nanotechnology to wean world from fossil fuels
2. Researchers uncover worlds oldest fossil impression of a flying insect
3. Caltech geobiologists discover unique magnetic death star fossil
4. Living fossil tree contains genetic imprints of rain forests under climate change
5. Bacterial biofilms as fossil makers
6. Hobbit fossils represent a new species, concludes University of Minnesota anthropologist
7. Dinosaur fossils fit perfectly into the evolutionary tree of life
8. Early whales gave birth on land, fossil find reveals
9. Worlds largest snake discovered in fossilized rainforest
10. Origin of claws seen in 390-million-year-old fossil
11. Famous fossil Lucy scanned at the University of Texas at Austin
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Fossil discovery represents new milestone in early mammal evolution
(Date:12/22/2014)... 2014 Holiday Season may be the brightest ever for ... the long anticipated floodgates for consumer biometrics may finally ... phones, tablets, and wearable mobile devices that incorporate biometrics ... with nearly 4.8 billion biometric devices by 2020.   ...
(Date:12/19/2014)... 18, 2014 Research and Markets ( http://www.researchandmarkets.com/research/86ncd6/micro_market ) ... North America Perimeter Security Systems Market" report to their ... The North American perimeter security market is estimated to grow ... the U.S. market holds a larger share in this market, ...
(Date:12/19/2014)... 2014   LaunchKey , the first decentralized mobile authentication ... of Things era, today announced the close of $3 ... led by Metamorphic Ventures with participation from ENIAC Ventures, ... others.  LaunchKey has raised $4 million to date, and ...
Breaking Biology News(10 mins):First Season of Holiday Shopping with Mobile Biometric Payments Wraps Up With a Present for Biometrics Industry: A Rosy Forecast for More Than 2 Billion Users of 4.8 Billion Mobile Biometric Devices by 2020 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3
... has been awarded a $2 million federal grant to ... that can be grown together to create a high-yield, ... National Science Foundation funding for the project begins ... effort will involve growing various combinations of lake algae ...
... rubber-like protein that enables dragonflies, grasshoppers and other insects ... potential uses in medicine, scientists conclude in an article ... evaluates the latest advances toward using a protein called ... Kristi Kiick and colleagues explain that scientists discovered resilin ...
... Governing Board of the Entomological Society of America (ESA) ... 2013. The election as a Fellow acknowledges outstanding contributions ... research, teaching, extension, or administration. The following Fellows will ... Meeting -- which will be held November 10-13, 2013 ...
Cached Biology News:U-M researchers land $2M grant to 'cooperate with nature' on growing algae for energy 2U-M researchers land $2M grant to 'cooperate with nature' on growing algae for energy 3U-M researchers land $2M grant to 'cooperate with nature' on growing algae for energy 4U-M researchers land $2M grant to 'cooperate with nature' on growing algae for energy 5Entomological Society of America announces 2013 fellows 2Entomological Society of America announces 2013 fellows 3Entomological Society of America announces 2013 fellows 4Entomological Society of America announces 2013 fellows 5Entomological Society of America announces 2013 fellows 6Entomological Society of America announces 2013 fellows 7Entomological Society of America announces 2013 fellows 8Entomological Society of America announces 2013 fellows 9Entomological Society of America announces 2013 fellows 10Entomological Society of America announces 2013 fellows 11Entomological Society of America announces 2013 fellows 12Entomological Society of America announces 2013 fellows 13Entomological Society of America announces 2013 fellows 14Entomological Society of America announces 2013 fellows 15Entomological Society of America announces 2013 fellows 16Entomological Society of America announces 2013 fellows 17
(Date:1/23/2015)... Jan. 23, 2015  Array BioPharma Inc. (NASDAQ: ... definitive agreement with Novartis Pharma AG to acquire worldwide ... Phase 3 development.  This agreement is conditional on the closing ... on April 22, 2014, which are expected to close in ...
(Date:1/22/2015)... (PRWEB) January 22, 2015 GEA Niro ... table top laboratory homogenizer, the PandaPLUS 2000, which is ... nanoemulsions , and cell disruption . This compact ... products, fruit juices, liquid food, food additives and ingredients ...
(Date:1/22/2015)... / Rootstown, OH (PRWEB) January 22, 2015 ... platform, announced today that it has received AOAC-PTM Certifications for ... O1O3, O111, O121, and O145; collectively referred to as STEC ... O157, at 1 colony forming unit (cfu) per 325 g ...
(Date:1/22/2015)... 22, 2015 Selexis SA, a serial ... Cell Banks (RCBs) used for drug discovery to commercial ... will include Next-Generation Sequencing (NGS) data packages. ... biologic manufacturing by ensuring the integrity of the gene, ...
Breaking Biology Technology:Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 2Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 3Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 4Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 5Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 6Array Announces Agreement To Acquire ENCORAFENIB (LGX818) 7GEA Niro Soavi Announces the PandaPLUS 2000 Homogenizer for Processing New Applications for Nanoemulsions and Cell Disruption 2Crystal Diagnostics Awarded AOAC-PTM Accreditation for the Rapid Detection of “Big 6” E.coli Food Pathogens 2Selexis Generated Research Cell Banks Now Fully Sequenced Using Next-Generation Sequencing 2
... Ill., Oct. 10 During a hospital,stay, what is ... could,prolong your length of stay? What is the likelihood ... the hospital to improve the,chance of survival? What percentage ... Finding the answers to these important questions can be ...
... Monogram,Biosciences, Inc. (Nasdaq: MGRM ) announced today ... Financial Officer, is,scheduled to present a corporate overview ... 13, 2007 at 11:00 a.m. (Eastern Time) at,the ... access the live audio broadcast or the subsequent ...
... Oct. 31, 2007 TIME: 8:30 a.m. Eastern Time HOST: Dr. Candace ... Kendle, Chairman ... conduct a telephone conference call and simultaneous webcast Oct. 31,at 8:30 a.m. ... question and answer session will follow. (Logo: http://www.newscom.com/cgi-bin/prnh/20030429/KNDLLOGO ) ...
Cached Biology Technology:Candid Details on Hospital's Quality of Care Are Now at Your Fingertips - Just Like It Should Be 2Monogram Biosciences to Present at the JMP Securities Healthcare Conference 2Kendle Invites You to Attend Its Third Quarter 2007 Earnings Conference Call and Webcast 2
... personal-sized Thermal Cycler is the ideal instrument for ... range of PCR applications. Get Applied ... Save lab space without sacrificing results. ... Industry-Standard PCR Technology You Can Afford ...
... upgraded micro 10 represents a major advance ... of the benefits of large robotic liquid ... benchtop dispenser. Dispensing accurate volumes ranging from ... 10 has unique advantages not yet found ...
This free-standing laminar flow hood provides a horizontal flow of HEPA-filtered air to create a clean processing area. Air return slots along the front and side edges of the work area enhance system...
... Motic's B3 series of microscopes offer all ... required for laboratory work. Equipped with Koehler ... Contrast (ASC) objectives. The B3 is the ... Siedentopf binocular tube eliminates the need for ...
Biology Products: