Sinraptor (Chinese thief)
Sinraptor (Chinese thief)
Named By : Currie & Zhao – 1994
Diet : Carnivore
Size : Estimated 7.6 meters long
Type of Dinosaur : Large Theropod
Type Species : S. dongi (type), S. hepingensis
Found in : China – Shishugou Formation
When it Lived : Mid Jurassic, 169-142 million years ago
Sinraptor is a genus belonging to metriacanthosaurid theropod dinosaurs of in the Late Jurassic. Sinraptor’s name originates in the Latin suffix “Sino”, meaning Chinese as well as “raptor” meaning robber. The particular name, dongi, honors Dong Zhiming. In spite of its name, Sinraptor isn’t associated with the dromaeosaurids (often called “raptors”) like Velociraptor. It was actually an animal that was distantly related to Allosaurus. Sinraptor, along with its close cousins were the first people to be part of the Jurassic carnosaurian radiation. Sinraptor still remains the best-known member of the family Metriacanthosauridae, with some older sources even using the name “Sinraptoridae” for the family.
Ian Armstrong from Travelling the world at moment, Australia, CC BY-SA 2.0, via Wikimedia Commons
The Sinraptor holotype was discovered in the Shishugou Formation during a joint expedition by Canadians and Chinese into the northern Chinese desert back in the year 1987 and then described in the work of Philip J. Currie and Zhao Xijin in 1994. It is nearly 3 metres (9.8 feet) tall, and measuring around 7.6 metres (25 feet) in length Two species of Sinraptor have been identified. S. dongi, the kind species, was identified in 1994 by Currie and Zhao in 1994. Another species, initially known as Yangchuanosaurus the hepingensis species in the work of Gao in 1992 could be a different kind of Sinraptor. Whether or not this is the case, Sinraptor and Yangchuanosaurus were close relatives, and are classified together in the family Metriacanthosauridae. Holtz estimated the size as being 8.8 meters (29 feet) in length. In 2016 , other authors declared that the tooth holotype (IVPP 10600) was a subadult , and determined to be the same size as the likely adult tooth (the tooth IVPP 15310) at 11.5 meters (37.7 feet) and 3.9 tonnes (4.3 short tons).
Dentitions of Sinraptor was quite similar to the one of Allosaurus and showed that it probably hunted medium-sized dinosaurs, like stegosaurs, using its teeth that resembled blades to inflict massive mortal wounds.
The Skeletal remains of Sinraptor Hepingensis (formerly called Yangchuanosaurus) is displayed in the Zigong Dinosaur Museum in Zigong, China.