A new species of raptor dinosaur being named Linheraptor exquisitus has been discovered by George Washington University doctoral candidate Jonah Choiniere and Michael D. Pittman, a graduate student at University College London (UCL).
The exceptionally well-preserved, nearly complete skeleton is a relative of the well-known species Velociraptor, and will help scientists further describe the physical appearance of other closely-related dinosaurs within the Dromaeosauridae family. The research, led by Xu Xing of the Chinese Academy of Sciences' Institute of Vertebrate Paleontology and Paleoanthropology, will be published in the March 19, 2010, issue of Zootaxa.
"I only saw the tip of the claw sticking out of a cliff face, and it was a total surprise that the whole skeleton was buried deeper in the rock," said Mr. Choiniere. "This fossil is going to tell us a lot about the evolution of the skeleton in the group that includes Velociraptor."
At approximately eight feet long and 50 pounds, the researchers believe Linheraptor would have been a fast, agile predator that preyed on small horned dinosaurs related to Triceratops. Like other dromaeosaurids, it possessed a large, highly curved claw on the foot, which may have been used to capture prey. Within the Dromaeosauridae family, Linheraptor is most closely related to another recently discovered species Tsaagan mangas. The head and neck of the Tsaagan skeleton was discovered in Mongolia in 1993 by James Clark, the Ronald B. Weintraub Professor of Biology at The George Washington University's Columbian College of Arts and Sciences. Tsaagan's skull indicates that it is more primitive than Velociraptor, and the skeleton of the new species should help reconstruct the series of evolutionary changes within the Dromaeosauridae.
"This is a really beautiful fossil and it documents a transitional stage in dromaeosaurid evolution," said Dr. Xu.
Linheraptor was found by the researchers in approximately 75 million year-old red sandstone rocks during a 2008 field expedition in Inner Mongolia, China. It is the fifth dromaeosaurid discovered in these rocks, which are famous for their preservation of uncrushed, complete skeletons. These red sandstones are best known from the Flaming Cliffs field site in outer Mongolia, the location where Velociraptor was discovered and dinosaur eggs and nests were first found.
"The original Tsaagan find was very intriguing, and this discovery should really help us flesh out what these animals looked like," said Dr. Clark.
Dromaeosauridae is a family of bird-like theropod dinosaurs that lived during the Cretaceous Period. In addition to Linheraptor and Velociraptor, theropod dinosaurs include charismatic meat-eaters like Tyrannosaurus rex and modern birds.
This research was funded by the U.S. National Science Foundation and the Chinese National Science Foundation, the Jurassic Foundation, the Geological Society of London and The George Washington University.
Mr. Choiniere is a doctoral student of Dr. Clark's and first accompanied Dr. Clark on his excavations in China in 2005. Though this discovery is Mr. Choiniere's first significant fossil find, he was the lead author of the recent Science article, "A Basal Alvarezsauroid Theropod from the Early Late Jurassic of Xinjiang, China." Mr. Pittman is a doctoral student of Dr. Paul Upchurch and Dr. John R. Hutchinson and has worked with Chinese scientists since 2006.
The article, "A new dromaeosaurid (Dinosauria: Theropoda) from the Upper Cretaceous Wulansuhai Formation of Inner Mongolia, China," appears in the March 19, 2010, issue of Zootaxa. Zootaxa is an international journal for animal taxonomists.
Established in 1821 in the heart of the nation's capital, GW's Columbian College of Arts and Sciences is the largest of the University's academic units with more than 40 departments and programs for undergraduate, graduate and professional studies. Columbian College provides the foundation for GW's commitment to education, research and outreach, providing courses ranging from the traditional disciplines to a wide variety of interdisciplinary and applied fields for students in all the undergraduate degree programs across the University. An internationally recognized faculty and active partnerships with prestigious research institutions place Columbian College at the forefront in advancing policy, enhancing culture and transforming lives through scientific research and discovery.
In the heart of the nation's capital with additional programs in Virginia, The George Washington University was created by an Act of Congress in 1821. Today, GW is the largest institution of higher education in the District of Columbia. The University offers comprehensive programs of undergraduate and graduate liberal arts study, as well as degree programs in medicine, public health, law, engineering, education, business and international affairs. Each year, GW enrolls a diverse population of undergraduate, graduate and professional students from all 50 states, the District of Columbia, and more than 130 countries.
Founded in 1826, UCL was the first English university established after Oxford and Cambridge, the first to admit students regardless of race, class, religion or gender and the first to provide systematic teaching of law, architecture and medicine. UCL is the fourth-ranked university in the 2009 THES-QS World University Rankings. UCL alumni include Marie Stopes, Jonathan Dimbleby, Lord Woolf, Alexander Graham Bell and members of the band Coldplay. UCL currently has over 12,000 undergraduate and 8,000 postgraduate students. Its annual income is over $900 million.
Photos are available upon request. Please contact Emily Cain at email@example.com or (202) 994-3087.
Emily Cain | EurekAlert!
Multi-institutional collaboration uncovers how molecular machines assemble
02.12.2016 | Salk Institute
Fertilized egg cells trigger and monitor loss of sperm’s epigenetic memory
02.12.2016 | IMBA - Institut für Molekulare Biotechnologie der Österreichischen Akademie der Wissenschaften GmbH
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy