(derived
from a combination of Latin and Greek, meaning 'Chinese bird-lizard')
is a genus of feathered dromaeosaurid dinosaur from the early Cretaceous
Period (early Aptian) of the Yixian Formation in what is now China. It
was the fifth non–avian feathered dinosaur genus discovered by 1999.
Sinornithosaurus was discovered by Xu Xing, Wang Xiaolin and Wu Xiaochun of the Institute of Vertebrate Paleontology and Paleoanthropology of Beijing. An almost-complete fossil with feather impressions, was recovered from Liaoning Province, China, in the Yixian Formation; the same incredibly rich location where four dinosaurs with feathers were discovered previously
