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, 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:

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

Note: 2 eggs and a lower jaw of a lizard 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 jaws and skeletal elements in the stomach region (CURRIE & CHEN, 2001)

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

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Species: lingyuanensis QIU, WANG, JIANG, MENG & ZHOU, 2025
Etymology: lingyuan, a Chinese county-level city where the holotype was found.
= Sinosauropteryx prima MANABE, 2005, LINGHAM-SOLIAR, FEDUCCIA & WANG, 2007, JI, GAO, LIU, MENG & JI, 2007

Holotype: IVPP 12415

Locality: Dawangzhangzi, Lingyuan, Liaoning Province, China.

Horizon Dawangzhangzi bed, Yixian Formation, Upper Jehol Group.

Biostratigraphy:

Age: Barremian Stage, Lower Gallic Subepoch, Middle Early Cretaceous Epoch, Early Cretaceous.

Material: Skull and skeleton missing the feet, and the posterior caudal vertebrae of a juvenile.

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