Genus: Yi XU, ZHENG, SULLIVAN, WANG, XING, WANG, ZHANG, O'CONNOR, ZHANG, & PAN, 2015
Etymology: Mandarin, yi, "wing."

Species: qi XU, ZHENG, SULLIVAN, WANG, XING, WANG, ZHANG, O'CONNOR, ZHANG, & PAN, 2015
Etymology: Mandrin, qi, "strange."

Holotype: STM 31-2

Locality: Mutoudeng, Qinglong County, Hebei Province, China.

Horizon: Tiaojishan Formation.

Biostratigraphy:

Age: Upper Callovian Stage, Upper Dogger Epoch, or lower Oxfordian Stage, Lower Malm Epoch, Late Jurassic.

Material: Skull and fragmentary specimen.

Yi qi (modified from XU, et al., 2015), Holotype: STM 31-2.

Note: Skin and feather impressions.