Genus: Tianyuornis ZHENG, O’CONNOR, WANG, ZHANG, & WANG,
Etymology: The genus name refers to Shandong Tianyu Museum of Nature where the specimen is housed, and Greek, ornis, "bird."
Species: cheni ZHENG, O’CONNOR, WANG, ZHANG, & WANG, 2014
Etymology: In honor of Professor Chen Pijii for his great contribution to Chinese geology and generous support of the developemnt of STM.
Holotype: STM7-53 (part and counterpart)
Locality: Xisanji locality, Ningcheng, Nei Mongol (Inner Mongolia), China.
Horizon: Yixian Formation.
Age: Aptian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.
Material: A nearly complete subadult specimen.
Note: Has feather impressions.