Genus: Jeholodens, JI, ZHENXI & JI, 1999
Etymology: Jehol: an ancient geographic name for the western part of the Liaoning Province, China; the namesake of the Jehol fauna in the Yixian Formation that yielded the holotype; Greek, odens, “tooth”: Jehol tooth.

Species: jenkinsi JI, ZHEXI & JI, 1999
Etymology: In honor of F. A. Jenkins Jr for his pioneer studies of the evolutionary morphology of the mammalian post-cranial skeleton.

Holotype: GMV 2139a, b.

Locality: The Siheutan site, at roughly 41?40’12”N, 120?47’36”E, about 32 km east of Chaoyang City, Shangyuan, Beipaio City, 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.

Material: A nearly complete skeleton consisting of a partial skull and all the postcranial skeleton preserved as two counterparts.

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-25: Skull and skeleton with hair impressions.