Navigation Links
After 121 years, identification of 'grave robber' fossil solves a paleontological enigma
Date:11/19/2012

it must be fossoriala burrowing, digging mammal. Burrowing mammals have a wide humerus (upper arm bone) that is specialized for digging and tunneling. The humerus of Necrolestes is wider than any other fossorial mammals, indicating that Necrolestes was particularly specialized for diggingperhaps more so than any other known burrowing mammalbut this trait didnt make classification any easier. The simple triangular teeth of Necrolestes served it well in feeding on subterranean invertebrates. However, until recently, its teeth have proved of little help in classifying Necrolestes, because they are so simplified and show no unambiguous similarities to those of other mammals. Enter Cronopio.

The mystery solved

In 2011, a newly discovered extinct mammal named Cronopio was the key that unlocked the mystery of the burrowing enigma. Discovered by co-author Rougier in South America, Cronopio belongs to the Meridiolestida, a little-known group of extinct mammals found in the Late Cretaceous and early Paleocene (10060 million years ago) of South America. Not only were Cronopio and Necrolestes found to have remarkable similarities, they are the only known mammals to have single-rooted molarsmost mammals have double-rooted molars. This conclusively showed that Necrolestes was neither a marsupial nor a placental mammal, and was in fact the last remaining member of the Meridiolestida lineage, thought to have gone extinct 45 million years earlier.

If we didnt know those fossils, says Wible of Cronopio, we might have come to the same conclusion that everybody else hadthat the relationships of Necrolestes were unknowable.

Evolutionary implications

The mass extinction that ended the Age of Dinosaurs wiped out thousands of species. Included in the devastation were the Meridiolestida, the mammal group to which Cronopio and Necrolestes belong, cutting s
'/>"/>

Contact: Leigh Kish
KishL@carnegiemnh.org
412-622-3361
Carnegie Museum of Natural History
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology news :

1. 1 year after Fukushima
2. AGU: Venice hasnt stopped sinking after all
3. Black flies may have a purpose after all
4. Estrogen hormone reveals protective ability after traumatic brain injury
5. Obstructive sleep apneas damage evident after 1 month
6. Scientists read the ash from the Icelandic volcano 2 years after its eruption
7. Microbial communities shifted dramatically after Deepwater Horizon spill
8. Regenerated cells may restore vision after corneal dysfunction
9. Cinega de Santa Clara unchanged after pilot run of Yuma Desalting Plant
10. Promiscuous squid fatigued after mating
11. Ethylene of no effect - why peppers do not mature after picking
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
After 121 years, identification of 'grave robber' fossil solves a paleontological enigma
(Date:12/10/2014)... 2014 You,ve been here before: you desperately need ... your password, site key or the answer to your secret ... teacher? Today, Hoyos Labs , a ... will finally put an end to the frustration that comes ... . 1U leverages a user,s smartphone to acquire his or ...
(Date:12/10/2014)... , Dec. 08, 2014 Research and Markets ... addition of the "Biometrics Market in Japan ... http://photos.prnewswire.com/prnh/20130307/600769 The ... such as rural banking and upgradation of the ... witnessed in the market. Besides the aforementioned projects, ...
(Date:12/4/2014)... , Dec. 3, 2014  Crossmatch™, a ... announced that its DigitalPersona ® Pro Enterprise ... have been deployed throughout First Bank branch locations ... South Carolina and Virginia. First Bank, ... Southern Pines, North Carolina , selected ...
Breaking Biology News(10 mins):The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 3Biometrics Market in Japan 2014-2018: Key Vendors are DDS, Fujitsu, Hitachi and NEC 2First Bank Partners with Crossmatch to Increase Log In Security 2First Bank Partners with Crossmatch to Increase Log In Security 3
... is funding a new Physics Frontiers Center at the University ... Living Cells is one of nine Physics Frontiers Centers in ... biological systems. The $7.5 million award will be supplemented ... the total funding to $8.25 million over five years. ...
... that contains enough essential vitamins and minerals. Analysis ... status has shown that the average child gets the recommended ... more added sugars than recommended. The study published ... at a nationally representative sample of children aged 4-18 years ...
... available in German . , Dessau. Extreme ... more than plants. This is the finding of a study ... TU Berlin, the German Federal Institute of Hydrology (BfG), KON ... before and after the Elbe floods of August 2002. Flow ...
Cached Biology News:NSF funds new 'Center for the Physics of Living Cells' at Illinois 2NSF funds new 'Center for the Physics of Living Cells' at Illinois 3Variety of foods -- the key for child nutrition 2Vegetation hardly affected by extreme flood events 2
(Date:12/22/2014)... Malvern, PA & Brussels (PRWEB) December 22, 2014 ... Education (CfPIE), the global leader of technical training ... Society for Clinical Data Management (SCDM) to ... training and certification programs —providing access to the ... The partnership extends SCDM members with 10% off when ...
(Date:12/22/2014)... , Dec. 22, 2014  ( www.competitivehealth.com ) — ... online medical bill review and advocacy service, has signed ... FREE WellCard Savings discount health services marketplace. ... was more than they expected to pay. As part ... care costs, WellCard Savings is pleased to offer medical ...
(Date:12/19/2014)... Charm Sciences is pleased to announce ... of Aflatoxin M1 in raw commingled milk is the ... validation. The peer reviewed report of the validation by ... Agricultural and Fisheries Research (ILVO-T&V) has been published by ... the most toxic aflatoxin and a known carcinogen, can ...
(Date:12/19/2014)... 2014 Decision Resources Group finds that the ... 12 percent compound annual growth rate through 2023. This ... and the increasing adoption of dental implants. Growing aesthetic ... also spur demand for dental biomaterials because they can ... treatments. Other key findings from Decision Resources ...
Breaking Biology Technology:CfPIE Announces Partnership with the Society for Clinical Data Management 2CfPIE Announces Partnership with the Society for Clinical Data Management 3WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Charm Sciences Achieves Independent Validation of First 15 Minute Quantitative Screening Method for Aflatoxin M1 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 3
... Placing the lower case "i" next to a word as a ... fame and glory may be possible, the chances of creating a ... icon is the exclusive longevity of its unique name, and for ... iWatch, Panasonic and not iTV. , ,Terms like interactive ...
... annual outlook for the year in a renovated Grand Ballroom of ... Froehlich of Deutsche Asset Management , Allan Murray of the ... Financial . , , Chicago Sun-Times columnist Terry Savage moderated ... spotlight on. , , Comparing last year to this year ...
... - The Medical College of Wisconsin , in ... been awarded a five-year, $8.1 million federal grant to develop ... and the majority of potential bioterrorism agents. , ,The grant, ... Institute of Allergy and Infectious Diseases , will be used ...
Cached Biology Technology:The I of the storm: iPhones, iPains, and iProblems 2The I of the storm: iPhones, iPains, and iProblems 3The I of the storm: iPhones, iPains, and iProblems 4Economic outlook for 2007, and still clueless on Apple 2Economic outlook for 2007, and still clueless on Apple 3Economic outlook for 2007, and still clueless on Apple 4Economic outlook for 2007, and still clueless on Apple 5Medical College lands $8.1M grant to detect bird flu, bioterror agents 2
UltraPure DNase/RNase-Free Distilled Water is designed for use in all molecular biology applications. It is 0.1-m membrane-filtered and tested for DNase and RNase activity....
...
The S. cerevisiae Hansen strains are the parental yeast strains from which the deletions were derived....
The DNA DipStick Kit is ideal for estimating nucleic acid concentrations and approximate yields. Works with ss- and ds-DNA, RNA, and oligonucleotides at concentrations as low as 0.1 ng/l....
Biology Products: