What is "sinornis"

Sinornis is a genus of enantiornithine birds. The fossils recovered from the Lower Cretaceous lake deposits from the Jiufotang Formation at Liaoning, People's Republic of China. This 135 million-year-old sparrow-sized skeleton represent a new avian which shares primitive features with Archaeopteryx as well as modern birds. Its primitive features include, but are not limited to a flexible manus with unguals, a footed pubis, and stomach ribs. As well as shedding a new light on the early evolution of avian flight and perching that lead to modern birds. Sinornis is known only from the type species, Sinornis santensis, from the words sino, 'China'; ornis, 'bird'; and the word santensis, meaning "from three temples" (for the traditional Chinese name for Chaoyoung county in Liaoning Province where the bird skeletons were found).