Genus: Eoenantiornis HOU, MARTIN, ZHOU & FEDUCCIA, 1999
Etymology: Greek, eo, “dawn”, and enantiornis, ‘opposite bird’: Dawn opposite bird.

Species: buhleri HOU, MARTIN, ZHOU & FEDUCCIA, 1999
Etymology: In honor of the late Paul Buhler, a distinguished German functional morphologist and paleornithologist.

Holotype: IVPP V11537

Locality: Shihetun (Heitizigou), Shangyuan (Shangyuanzhen), Beipiao City (Beipiaoshi), Liaoning Province, China.

Horizon: Horizon 1, Lower part of the Yixian Formation, Jehol Group.

Biostratigraphy: Psittacosaurus Fauna, Confuciusornis Avifauna.

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

Note: Aptian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous (ZHOU, et al, 2003).

Material: Nearly complete specimen.

Note: With feather 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:

IG-20: Skull and skeleton with feather impressions.