Species: prima JI & JI, 1996
Etymology: Latin, primus, "first."

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: Horizon 1, Lower part of the Yixian Formation, (Jiufotang Formation, = Chaomidianzi Formation of Ji et al, 1998), Jehol Group.

Biostratigraphy: Psittacosaurus Fauna, Confuciusornis Avifauna.

Age: Valanginian Stage, Upper Neocomian Subepoch, Early Early Cretaceous Epoch, Early Cretaceous.

Material: Nearly complete specimen with ‘feather’ impressions.

Referred material:

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

JZ-1: Cast?

FPDM-V6227: Free mounted skeleton cast.

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.

 

(3 Specimens, nearly complete, showing ‘feather’ impressions.)

Note: The article has it as… Sauriurae, Order: Sinosauropterygiformes, Family: Sinosauropterygidae…

 

Horizons as per WANG, WANG, WANG, XU, TANG, ZHANG, HU, GU & HAO, 1998

Locality: Sihetun, western Liaoning Province, Northeastern China.

Horizon: Yixian Formation, third member, grey, grayish-black, grayish-white shale with light yellow sandstone, siltstone, silty mudstone and more than 10 layers of light yellow tuffite, tuffaceous sandstone and mudstone.

Biostratigraphy:

Age: Early Cretaceous.

Material:

Number: Not given:

 

Locality: Sihetun, western Liaoning Province, Northeastern China.

Horizon: Tuchengzi Formation, first member, sandstone and sandstone with gravels, lower vertebrate-bearing horizon.

Biostratigraphy:

Age: Early Cretaceous.

Material:

Number: Not given:

 

Locality: Sihetun, western Liaoning Province, Northeastern China.

Horizon: Tuchengzi Formation, grayish-black shale with light yellow, yellow-brown fine sandstone and siltstone, upper and light-yellow, yellow-brown fine sandstone and siltstone in the lower part.

Biostratigraphy:

Age: Early Cretaceous.

Material:

Number: Not given:

 

Locality: Sihetun, western Liaoning Province, Northeastern China.

Horizon: Tuchengzi Formation, grayish-black shale with light yellow, yellow-brown fine sandstone and siltstone, upper part of the third cycle is grayish-black shale.

Biostratigraphy:

Age: Early Cretaceous.

Material:

Number: Not given:

 

MANABE, 2005, LINGHAM-SOLIAR, FEDUCCIA & WANG, 2007, JI, GAO, LIU, MENG & JI, 2007

Locality: Dawangzhangzi, Lingyuan, Liaoning Province, China.

Horizon Yixian Formation.

Biostratigraphy:

Age: Early Cretaceous.

Material:

IVPP V12415: Skull and skeleton.

Note: With feather impressions or as the authors calim, coligen fibers.

ZHANG, KEARNS, ORR, BENTON, ZHOU, JOHNSON, XU & WANG, 2010

IVPP 14202: Skull and skeleton.

Note: With feather impressions.