Synonym: Elongatoolithus tiantaiensis Fang 2000 [nomen dubium]
Full reference: K. F. Hirsch. 1994. Upper Jurassic eggshells from the Western Interior of North America. Dinosaur Eggs and Babies, Cambridge University Press, Cambridge 137-150
Parent taxon: Dinosauria according to M. T. Carrano 2013
Sister taxa: Actiosaurus, Carnosauriformes, Cridotrisauropus, Dictyoolithidae, Dystrophaeidae, Geosauridae, Gyrotrisauropus, Harpagosauria, Harpedactylus, Herreravia, Lagunculapes, Nyasasaurus, Ornithischia, Ornithischiformes, Ornithoscelida, Paleodinosauria, Phytodinosauria, Polemarchus, Rachitrema, Ravatosauropus, Saltosauropus, Saurischia, Sillimanius, Spondylosoma, Steropoides, Symphypoda, Tarsodactylus, Tarsoplectrus, Therosauria, Toyamasauripus, Tretospondylia, Xiphopeza, Youngoolithidae
Subtaxa: Preprismatoolithus, Prismatoolithus, Protoceratopsidovum, Sankofa, Spheruprismatoolithus
Ecology: