Navigation Links
New duck-billed dinosaur gives scientists clues to evolution of head ornamentation and provinciality
Date:7/20/2011

A new genus and species of hadrosaur (duck-billed) dinosaur the oldest duck-billed dinosaur known from North America has been named by scientists who expect the discovery to shed new light on dinosaur evolution.

The most striking feature of Acristavus gagslarsoni, the name given to the new dinosaur, is that its head lacked the distinctive ornamentation common to later duck-billed relatives. Acristavus means "non-crested grandfather." The genus name is symbolic of the animal's unadorned skull and the fact that it preceded later hadrosaurs.

All other hadrosaur fossils come with some kind of adornment on their skulls (with one exception from the end of the Cretaceous Period, the time just before the K-T extinction.) Ornamentation varied among hadrosaurs. Some adornments were hollow and part of the creatures' breathing apparatus, whereas others were solid. Scientists speculate the crests played a role in species recognition where one species could tell another apart by unique embellishments.

The new fossil hints that the two different styles of hadrosaur headgear evolved independently from an ancestor that did not possess ornamentation.

Especially exciting is that the two fossils of the 79.3 million-year-old dinosaurs were discovered in different locations, suggesting that earlier species of duck-billed dinosaurs roamed over a much larger region of North America than their successors four million years later.

"To find two specimens 650 miles apart that lived at virtually the same time, and were discovered within one year of one another is extremely rare in dinosaur paleontology," said Terry Gates, a research associate at Chicago's Field Museum, and a member of the team that documents the discovery in the July issue of the Journal of Vertebrate Paleontology.

The first fossil specimen was found in Montana in 1999 by the Old Trail Museum staff and volunteers, including a group of "junior paleontologists" from the Unive
'/>"/>

Contact: Nancy O'Shea
noshea@fieldmuseum.org
312-665-7103
Field Museum
Source:Eurekalert

Page: 1 2

Related biology news :

1. Americas smallest dinosaur uncovered
2. Meat-eating dinosaur from Argentina had bird-like breathing system
3. New meat-eating dinosaur from Argentina had bird-like breathing system
4. Mass extinctions and the evolution of dinosaurs
5. A new dinosaur species, Pachyrhinosaur lakustai, unveiled from Pipestone Creek, Alberta, Canada
6. Brain structure provides key to unraveling function of bizarre dinosaur crests
7. Key to function of dinosaur crests found in brain structure
8. Geologist who linked cosmic strike to dinosaurs extinction takes top prize
9. A dinosaur dance floor
10. Study of polar dinosaur migration questions whether dinosaurs were truly the first great migrators
11. Paleontologists doubt dinosaur dance floor
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/17/2014)... Accurate knowledge regarding Ebola is critical and pertinent for ... hazardous global outbreak and epidemic. The Journal, Disaster ... special issue, Ebola Virus and Public Health, to surround ... in this critical societal moment. , On October ... for Clinicians . The primer was prepared by Dr. ...
(Date:10/17/2014)... is available in German . ... very few drugs. When treating overdoses, doctors are often limited ... difficult if there is a combination of drugs involved. So ... accidentally swallows his grandmother,s pills? ETH professor Jean-Christophe Leroux from ... find an answer to this question. "The task was to ...
(Date:10/16/2014)... land managers have a new synthesis of recent research ... (MMC) forests in the two states. , The ... Oregon and Washington: A Synthesis of the Relevant Biophysical ... technical report published by the U.S. Forest Service,s Pacific ... request from managers for a synthesis of the large ...
Breaking Biology News(10 mins):Emergency aid for overdoses 2Emergency aid for overdoses 3New report synthesizes best available science on management of moist mixed-conifer forests 2
... The National Space Biomedical Research Institute (NSBRI) has renewed awards ... the Massachusetts Institute of Technology and Texas A&M University. In ... to work toward a Ph.D. that focuses specifically on space ... million over a five-year period. "MIT and Texas ...
... University of Illinois at Chicago has been awarded a ... community-based health promotion programs for older adults with osteoarthritis. ... on Aging. The study will compare Fit and ... program, with Fit and Strong! Plus, the traditional program ...
... Clemson University researchers are teaming up with Coastal ... of sensors along the Savannah River to gather data ... will collect and transmit real-time information about the quality ... Intelligent River project leaders Gene Eidson, director of Clemson,s ...
Cached Biology News:NSBRI renews space life sciences graduate programs at MIT, Texas A&M 2UIC study examines exercise and weight loss for older adults with osteoarthritis 2UIC study examines exercise and weight loss for older adults with osteoarthritis 3Clemson, Coastal Carolina universities to set hundreds of sensors in Savannah River 2
(Date:10/20/2014)... 20, 2014 Mapp Biopharmaceutical,s valiant effort ... therapeutic to fight the Ebola outbreak will make ... the production of pharmaceuticals can be, according to ... that while some may be taken aback by ... with industry knowledge are well aware of the ...
(Date:10/20/2014)... -- GenVec, Inc. (NASDAQ: GNVC ) today announced the ... board of directors effective on October 24, 2014.   Dr. Horovitz ... its chairman from June 2006 to November 2013.  During his ... and Audit Committees of the board.  "We ... service to GenVec, and its stockholders," said Wayne T. ...
(Date:10/19/2014)... (PRWEB) October 19, 2014 The Latin ... the market in Latin America with analysis and forecast ... in 2013, and is expected to reach $2,366.8 million ... to 2018. , Browse through the TOC of the ... idea of the in-depth analysis provided. It also provides ...
(Date:10/19/2014)... The Asia-Pacific Speech Analytics market report defines ... analysis and forecast of revenue. This market is estimated ... million by 2019, at a Compound Annual Growth Rate ... through the TOC of the Asia-Pacific Speech Analytics market ... provided. It also provides a glimpse of the segmentation ...
Breaking Biology Technology:Kalorama: ZMapp Highlights Need For Faster Biopharmaceutical Production 2Kalorama: ZMapp Highlights Need For Faster Biopharmaceutical Production 3Zola P. Horovitz To Retire From GenVec Board 2The Latin American hardware encryption display market is expected to reach $2,366.8 million by 2018 - New Report by MicroMarket Monitor 2The Latin American hardware encryption display market is expected to reach $2,366.8 million by 2018 - New Report by MicroMarket Monitor 3The Asia-Pacific Speech Analytics market is estimated to reach $208 million by 2019 - New Report by MicroMarket Monitor 2The Asia-Pacific Speech Analytics market is estimated to reach $208 million by 2019 - New Report by MicroMarket Monitor 3The Asia-Pacific Speech Analytics market is estimated to reach $208 million by 2019 - New Report by MicroMarket Monitor 4
... in Diversity, Military and Campus Recruitment, and Employment Branding joins Pierpoint ... ... San Jose, CA (PRWEB) October 20, 2008 -- Pierpoint ... Vice President of Recruitment Operations and Diversity. Mr. Cantu, most recently ...
... SETAUKET, N.Y., Oct. 20 John S. Kovach,M.D., ... Biotechnology Holdings,Inc. (OTC Bulletin Board: LIXT), announces the ... of Directors., Dr. Sorensen is currently Board ... He is a highly experienced leader and,administrator in ...
... announced today that the Company will host an investor ... PM Eastern Time to present an,analysis of the data ... IT-R-006) for the treatment of nasolabial folds, or,wrinkles. On ... results from these two studies, which met all primary ...
Cached Biology Technology:Robert Cantu Appointed Vice President of Pierpoint International 2Lixte Biotechnology Holdings Announces New Appointment to Board of Directors 2Lixte Biotechnology Holdings Announces New Appointment to Board of Directors 3Lixte Biotechnology Holdings Announces New Appointment to Board of Directors 4Isolagen to Host Investor Conference Call to Present an Analysis of the Data from Phase III Wrinkle Studies 2
... CL3 series is designed to enhance ... clinical applications at a reasonable cost. ... quick connect rotors and various biocontainment ... interface allows you to control and ...
PP2B-Abeta (C-20)...
DNA Polymerase I Large (Klenow) Fragment is a DNA polymerase that lacks the 5'Cut Site3' exodeoxyribonuclease activity of intact DNA Polymerase I but it contains the 3'Cut Site5' exodeoxyribonuclease...
... a fully licensed, high throughput, water bath thermal ... to 24 microplates. This equates to 9,216 reactions ... A robotic arm rapidly transfers a basket of ... ramping times that are considerably faster than those ...
Biology Products: