"In a calcareous layer in the Yihsien formation of Upper? Cretaceous age, Yang-Lui-T'un, Yih-Hsien-Fêngtien", China [details]
"In a calcareous layer in the Yihsien formation of Upper? Cretaceous age, Yang-Lui-T'un, Yih-Hsien-Fêngtien", China [details]
"in the Yihsien formation of Yang-Lui-T'un, Yih-Hsien, Fêngtien", China [details]
"in the Yihsien formation of Yang-Lui-T'un, Yih-Hsien, Fêngtien", China [details]
"in the Hungyüan argillutytes of Hun-Yüan-Hsien, Shansi", China [details]
"In the Jehol fish-beds of Lower Cretaceous age at Johol in North China" [details]