Navigation Links
Sands of Gobi Desert yield new species of nut-cracking dinosaur

Plants or meat: That's about all that fossils ever tell paleontologists about a dinosaur's diet. But the skull characteristics of a new species of parrot-beaked dinosaur and its associated gizzard stones indicate that the animal fed on nuts and/or seeds. These characteristics present the first solid evidence of nut-eating in any dinosaur.

"The parallels in the skull to that in parrots, the descendants of dinosaurs most famous for their nut-cracking habits, is remarkable," said Paul Sereno, a paleontologist at the University of Chicago and National Geographic Explorer-in-Residence. Sereno and two colleagues from the People's Republic of China announce their discovery June 17 in the Proceedings of the Royal Society B.

The paleontologists discovered the new dinosaur, which they've named Psittacosaurus gobiensis, in the Gobi Desert of Inner Mongolia in 2001, and spent years preparing and studying the specimen. The dinosaur is approximately 110 million years old, dating to the mid-Cretaceous Period.

The quantity and size of gizzard stones in birds correlates with dietary preference. Larger, more numerous gizzard stones point to a diet of harder food, such as nuts and seeds. "The psittacosaur at hand has a huge pile of stomach stones, more than 50, to grind away at whatever it eats, and this is totally out of proportion to its three-foot body length," Sereno explained.

Technically speaking, the dinosaur is also important because it displays a whole new way of chewing, which Sereno and co-authors have dubbed "inclined-angle" chewing. "The jaws are drawn backward and upward instead of just closing or moving fore and aft," Sereno said. "It remains to be seen whether some other plant-eating dinosaurs or other reptiles had the same mechanism."

The unusual chewing style has solved a major mystery regarding the wear patterns on psittacosaur teeth. Psittacosaurs sported rigid skulls, but their teeth show the same sliding wear patterns as plant-eating dinosaurs with flexible skulls.


Contact: Steve Koppes
University of Chicago

Related biology news :

1. Will Europe at last unite to combat thousands of alien invaders?
2. Atlantic tuna return thousands of miles to birthplace to spawn
3. U-M scientists remove thousands of aspens to glimpse forests future
4. Ancient reptile rises from Alberta oil sands
5. Stanford researchers say living corals thousands of years old hold clues to past climate changes
6. Body weight influenced by thousands of genes
7. How mother of thousands makes plantlets
8. Thousands of starving children could be restored to health with peanut butter program
9. World Day to Combat Desertification focuses on human security
10. A research work will be the reference to characterize the climatic impact of desert dust
11. Desert woodrats switch one dietary poison for another
Post Your Comments:
Related Image:
Sands of Gobi Desert yield new species of nut-cracking dinosaur
(Date:10/27/2015)... BERLIN, Germany , October 27, 2015 ... 2015. SMI,s Automated Semantic Gaze Mapping technology (ASGM) automatically ... SMI,s Eye Tracking Glasses , so that ... Suite BeGaze. --> Munich, Germany ... technology (ASGM) automatically maps data from mobile eye tracking ...
(Date:10/26/2015)... and LAS VEGAS , Oct. ... Labs , an innovator in modern authentication and a ... announced the launch of its latest version of the ... enabling organizations to use standards-based authentication that supports existing ... S3 Authentication Suite is ideal for organizations deploying customer-facing ...
(Date:10/23/2015)... California , October 23, 2015 ... (SMI) announce a mobile plug and play integration of ... real-world tasks SensoMotoric Instruments (SMI) present ... wearable solutions for eye tracking and physiological data registration. ... SMI Eye Tracking Glasses 2w and physiological ...
Breaking Biology News(10 mins):
(Date:11/26/2015)... , November 26, 2015 ... --> Accutest Research Laboratories, a ... Research Organization (CRO), has formed a ... Center - Temple Health for joint ... ,     (Photo: ) , ...
(Date:11/25/2015)... 25, 2015 2 nouvelles études permettent ... les différences entre les souches bactériennes retrouvées dans la ... des êtres humains . Ces recherches  ouvrent une nouvelle ... prise en charge efficace de l,un des problèmes ... chats .    --> 2 nouvelles études ...
(Date:11/25/2015)... QUEBEC CITY , Nov. 25, 2015 /PRNewswire/ ... "Company"), affirms that its business and prospects remain ... , Zoptrex™ (zoptarelin doxorubicin) recently received DSMB ... program to completion following review of the final ... met Phase 2 Primary Endpoint in men with ...
(Date:11/25/2015)... (PRWEB) , ... November 25, 2015 , ... ... company uBiome, were featured on AngelList early in their initial angel funding process. ... AngelList syndicate for individuals looking to make early stage investments in the microbiome ...
Breaking Biology Technology: