Oogenus: Undulatoolithus WANG, ZHAO, WANG, LI & ZOU, 2013
Etymology: Latin, undulatus, 'wavy', Greek, Oo, 'egg', and Greek, lithus, 'rock or stone'.

Oospecies: pengi WANG, ZHAO, WANG, LI & ZOU, 2013
Etymology: In honor of the late Peng Anbao, chief curator of the Pingxian Museum, who collected and portected the dinosaur eggs from the Pingxian Basin.

Holotype: PXMV-0016

Locality: Chingxi, Pingxiang City, Jiangxi Province, China.

Horizon: Zhoutian Formation.

Biostratigraphy:

Age: Late Cretaceous.

Material: A clutch wiht 5 more or less well preserved eggs adn 3 broken eggs.