†family Tretospondylia Owen 1876 (dinosaur)
Full reference: R. Owen. 1876. On a new modification of dinosaurian vertebrae. Quarterly Journal of the Geological Society of London 32:43-46
Parent taxon: Dinosauria according to R. Owen 1876
Sister taxa: Actiosaurus, Carnosauriformes, Cridotrisauropus, Dictyoolithidae, Dystrophaeidae, Geosauridae, Gyrotrisauropus, Harpagosauria, Harpedactylus, Herreravia, Lagunculapes, Nyasasaurus, Ornithischia, Ornithischiformes, Ornithoscelida, Paleodinosauria, Phytodinosauria, Polemarchus, Prismatoolithidae, Rachitrema, Ravatosauropus, Saltosauropus, Saurischia, Sillimanius, Spondylosoma, Steropoides, Symphypoda, Tarsodactylus, Tarsoplectrus, Therosauria, Toyamasauripus, Xiphopeza, Youngoolithidae
Subtaxa: none
Ecology: