Species: prima JI & JI, 1996
Etymology:

Holotype: National Geological Museum of China, GMV2123, and counterpart, Nanjing Institute of Geology and Palaeontology NIGP 127586

Locality: Jianshangou-Sihetun area of Beipiao, Shangyuan, Beipiao City, Liaoning Province, China.

Horizon: Yixian Formation (Jiufotang Formation, = Chaomidianzi Formation of Ji et al, 1998), Jehol Group.

Biostratigraphy:

Age: Early Cretaceous.

Material: Nearly complete specimen with ‘feather’ impressions.

Referred material:

wNIGP 127587: Nearly complete skeleton, lacking only the distal end of tail.

Note: 2 eggs and elaments of a new genus of lizard (DONG & CHEN, 2000; a maxilla, occipital region, a pair of mandibles, 3 cervical vertebrae, 12 dorsal vertebrae, 3-4 caudal vertebrae and elements of the fore and hind limbs) found in it’s stomach area.

NGMC 2124: A nearly complete skeleton with ‘feather’ impressions.
Note: Initally described by JI & JI (1997). This specimen includes symmetrodont ammal 2 jaws (Zhangheotherium) and skeletal elements in the stomach region (CURRIE & CHEN, 2001). A third jaw belongs to Sinobaatar (HURUM, LUO & KIELAN-JAWOROWSKA, 2006)