Navigation Links
Newly discovered birdlike dinosaur is oldest raptor ever found in South America

estrial crocodiles and mammals.

"Except for its faunal composition, La Buitrera resembles the Gobi desert in its abundance of fossils and their exquisite state of preservation," Apestegua adds.

A cast of the unusual dinosaur is on public display on the upper floor of The Field Museum in the MacDonald's Preparation Lab. It will be part of Evolving Planet, a permanent exhibition that opens March 10, 2006.

Drifting continents

About 200 million years ago, all of the Earth's land was amassed in one supercontinent called Pangaea. During the Middle and Late Jurassic, Pangaea split into two landmasses. Laurasia, composed of North America, Asia and Europe, drifted to the north; Gondwana, composed of the southern hemisphere continents plus India, drifted to the south.

Until recently, dromaeosaurs (swift-running, bi-pedal, birdlike dinosaurs) have been found only in Cretaceous rocks of Asia and North America, northern continents that were part of Laurasia. (Laurasian dromaeosaurs include the famous Velociraptor from the Gobi Desert, the large Utahraptor from the American West, and the recently discovered Microraptor and Sinornithosaurus from China, both of which preserve amazing traces of bird-like plumage.) This distribution led scientists to believe that dromaeosaurs originated in Laurasia after it drifted apart from Gondwana.

In the last few years, however, a handful of specimens of possible dromaeosaurs or early birds have been discovered on southern continents. Nevertheless, their incomplete preservation led to some ambiguity and debate regarding their identities.

The new discovery provides definitive evidence that dromaeosaurs also lived in South America, which was part of Gondwana. As a result, dromaeosaurs must have originated when all of the continents were still assembled in a single landmass during the Jurassic as far back as 180 million years ago--much earlier than previously thought.

Result
'"/>

Source:Field Museum


Page: 1 2 3 4

Related biology news :

1. Newly-discovered class of genes determines ?and restricts ?stem cell fate
2. Newly discovered virus linked to childhood lung disorders and Kawasaki disease
3. Newly Discovered Compound Blocks Known Cancer-Causing Protein
4. Newly discovered pathway might help in design of cancer drugs
5. Newly Discovered Branding Process Helps Immune System Cells Pick Their Fights
6. Newly discovered protein an important tool for sleeping sickness research
7. Newly discovered genetic disease sheds light on bodys water balance
8. Newly Discovered Role for Heart Response Enzyme May Yield Better Heart Failure Therapy
9. Newly recognized gene mutation may reduce seeds, resurrect plants
10. Fitting in: Newly evolved genes adopt a variety of strategies to remain in the gene pool
11. Newly identified mechanism helps explain why people of African descent are more vulnerable to TB
Post Your Comments:
(Date:5/21/2013)... have charted the path of insulin action in cells ... comprehensive blueprint for understanding what goes wrong in diabetes. ... and Professor David James from Sydney,s Garvan Institute of ... edition of the prestigious journal Cell Metabolism . ... a very important role in the body because it ...
(Date:5/20/2013)... 20, 2013) University of Minnesota Medical School researchers ... partnership with the University,s Brain Tumor Program, have developed ... tumors (MPNST) that allow them to discover new genes ... The research was published this week in the journal ... transposon method, researchers in the lab of David Largaespada, ...
(Date:5/20/2013)... National Science Foundation (NSF) planning grant will help establish ... joint program of the University of Illinois at Urbana-Champaign ... "CARD will be devoted to research in drying moist, ... forestry and paper products; chemical products; textiles; and biopharmaceuticals," ... food science and human nutrition and the Illinois site ...
Breaking Biology News(10 mins):Insight into the dazzling impact of insulin in cells 2Insight into the dazzling impact of insulin in cells 3U of M researchers develop model for better testing, targeting of MPNST 2NSF approves planning grant for Center for Advanced Research in Drying 2
... LANSING, Mich. An engineering researcher and a global ... bringing a low-cost, hand-held device to nations with limited ... Syed Hashsham, a professor of civil and environmental ... is operated using an iPod Touch or Android-based tablet ...
... that the salmon are biting less, there are less of ... researcher at the University of Oviedo (Spain). The study, ... shows a "very marked" decline in Atlantic salmon ( Salmo ... (Asturias, northern Spain), especially during the last decade, almost simultaneously ...
... Washington, DC (August 26, 2011) African Americans are four ... new study has found that a condition that occurs when ... contributes to this increased risk. The study, conducted ... appears in an upcoming issue of the Journal of ...
Cached Biology News:Hand-held unit to detect cancer in poorer countries 2The same number of fishermen, but less salmon in Spanish rivers 2
(Date:5/21/2013)... 21, 2013 Many have long discussed ... to acne. Recently physicians from Clinical Psychiatry.com ... on the skin, and suggested using hypnotherapy ... chemicals produced from stress that cause acne. , Doctors ... feelings acne brings about, stress causes changes in the ...
(Date:5/21/2013)... 21, 2013  MacroGenics, Inc. today announced that ... (MGAH22), an Fc-modified chimeric monoclonal antibody (MAb), in ... oncoprotein," will be presented at the 2013 Annual ... during the Developmental Therapeutics - Immunotherapy Oral Abstract ... 4:30 PM.  The presentation will describe the results ...
(Date:5/21/2013)... 2013  Personal Genome Diagnostics Inc. (PGDx), today ... and expertise in genomic analysis of defined cancer ... with Blueprint Medicines.  PGDx is an innovator in ... in tumors, and Blueprint Medicines is an expert ... genetically defined patient population. "This collaboration ...
(Date:5/21/2013)... (PRWEB) May 21, 2013 Revolutionary Science, ... automatic colony counter, announced today that they have expanded ... products , the IncuCount, IntelliCount, InCount and ImpressCount. ... sophistication are especially useful in food microbiology and pharmaceutical ... an updated look. A bright white enclosure with ...
Breaking Biology Technology:Adult Acne Treatment, Probiotic Action Explains How Hypnotherapy and Probiotics May Cure Various Skin Conditions 2MacroGenics Announces Margetuximab (MGAH22) Phase 1 Data Presentation at ASCO; Initiates Phase 2 Clinical Study to Evaluate Activity of Margetuximab in Patients with Metastatic Breast Cancer 2MacroGenics Announces Margetuximab (MGAH22) Phase 1 Data Presentation at ASCO; Initiates Phase 2 Clinical Study to Evaluate Activity of Margetuximab in Patients with Metastatic Breast Cancer 3Personal Genome Diagnostics And Blueprint Medicines Form Collaboration to Identify Novel Kinase Targets 2Personal Genome Diagnostics And Blueprint Medicines Form Collaboration to Identify Novel Kinase Targets 3Revolutionary Science Announces New Automatic and Manual Colony Counting Products 2
... ... been selected by Prometheus as the sample collection kit for MyCeliacID™ a saliva-based genetic ... service as it solves sample collection challenges inherent with traditional collection methods which are ... ...
... CANTON, Mass., Aug. 18 Metabasis, a San Diego-based ... R&D equipment that is no longer essential to their ongoing ... and listed the premium lab and analytical equipment on the ... , , Metabasis is a biotech firm, ...
... , , ATLANTA, Aug. 18 ... medical device and cardiovascular tissue processing company, today announced the first ... FDA clearance. The surgeries were performed on pediatric patients at ... MI by Richard G. Ohye, M.D., associate professor of surgery, ...
Cached Biology Technology:DNA Genotek Sample Collection Kit Selected by Prometheus for MyCeliacID™ Genetic Test 2DNA Genotek Sample Collection Kit Selected by Prometheus for MyCeliacID™ Genetic Test 3Massive Inventory of Premium Lab & Analytical Equipment Now Available 2CryoLife Announces Implants of First FDA-Cleared SynerGraft(R) Processed Human Cardiac Patch Material 2CryoLife Announces Implants of First FDA-Cleared SynerGraft(R) Processed Human Cardiac Patch Material 3CryoLife Announces Implants of First FDA-Cleared SynerGraft(R) Processed Human Cardiac Patch Material 4
... Tecans state-of-the-art software for all your biopharmaceutical ... in a single, scalable software package. The ... simplifying the control of all Freedom instruments ... EVO 100 with one liquid handling arm ...
...
... The Synaptic Vesicles Isolation Kit provides ... an enriched synaptic vesicle fraction. The ... lysis of the synaptosomes, and differential ... gradient. The kit also contains an ...
... hybridization incubators with rotators. Graduated, 35 ... PP plug-seal screw-cap with O-ring for ... lengths to accept different size hybridization ... available separately. • Comp Dim: tube ...
Biology Products: