Genus: Eomaia JI, LUO, YUAN, WIBLE, ZHANG & GEORGI, 2002
Etymology: Greek, eo, "dawn" and Greek, maia, "mother"; Eomaia for the earliest known eutherian mammal.

Species: scansori JI, LUO, YUAN, WIBLE, ZHANG & GEORGI, 2002
Etymology: Latin, scansoria, for its specialized skeletal features for climbing.

Holotype: CAGS01-IBI-a,b

Locality: Dawangzhangzi Locality, Lingyuan County, Liaoning Province, China.

Horizon: Horizon II, Yixian Formation, Jehol Group.

Biostratigraphy: Psittacosaurus fauna, Liaoxiornis Avifauna.

Age: Lower Hautervian Stage, Uppermost Neocomian Subepoch, Lower Early Cretaceous Epoch, Early Cretaceous.

Material: Nearly complete specimen.
Note: With hair impressions.

Referred material:

AZUMA, 2005

Locality: Western Liaoning Province, China.

Horizon: Yixian Formation, Jehol Group.

Biostratigraphy: Psittacosaurus Fauna, Confuciusornis Avifauna.

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

Material:

JI-13a,b: Skull and skeleton with hair impressions.