Wang, Qiang, Zikui Zhao, Xiaolin Wang, Ning Li, and Songlin Zou. 2013. “A New Form of Elongatoolithidae, Undulatoolithus pengi Oogen. Et Oosp. Nov. From Pingxiang, Jiangxi, China”. Zootaxa 3746 (1). Auckland, New Zealand:194–200. https://doi.org/10.11646/zootaxa.3746.1.9.