Reptilia - Saurischia - Haplocanthosauridae
Full reference: J. F. Bonaparte. 1999. Evolución de las vértebras presacras en Sauropodomorpha [Evolution of the presacral vertebrae in Sauropodomorpha]. Ameghiniana 36(2):115-187
Parent taxon: Sauropoda according to J. F. Bonaparte 1999
Sister taxa: Acanthopholis platypus, Aepisaurus, Agustiniidae, Asiatosaurus, Astrodon johnstoni, Atlantosauridae, Atlantosaurus, Barosaurus affinis, Blikanasauridae, Bothriospondylidae, Bothriospondylus elongatus, Bothrosauropodidae, Bothrosauropodoidea, Brachiosaurus nougaredi, Brontopodidae, Brontopodus, Brontosauridae, Bruhathkayosaurus, Calorckosauripus, Camarasauroidea, Campylodoniscus, Cetiosaurus epioolithicus, Cetiosaurus hypoolithicus, Cetiosaurus longus, Cetiosaurus medius, Chiayusaurus, Chinshakiangosaurus, Chondrosteosaurus, Chubutisauridae, Clasmodosaurus, Clasmodosaurus spatula, Dachongosaurus, Damalasaurus, Eosauropoda, Faveoloolithidae, Gigantosaurus, Gravisauria, Hamanosauripus, Herrerasauridae, Homalosauropodidae, Homalosauropodoidea, Iguanodon praecursor, Isanosaurus, Koreanosauripus, Kotasaurus, Kunmingosaurus, Lamplughsaura, Lancanjiangosaurus, Lessemsauridae, Mamenchisauroidea, Mamenchisaurus fuxiensis, Mamenchisaurus guangyuanensis, Mamenchisaurus yunnanensis, Megalobrontes, Microdontosaurus, Microsaurops, Morinosaurus, Morinosaurus priscus, Morosauridae, Neosodon, Nurosaurus, Ohmdenosaurus, Oplosaurus, Ornithopsidae, Oshanosaurus, Parabrontopodidae, Pleurocoelus altus, Pleurocoelus nanus, Pleurocoelus valdensis, Polyonyx, Pulanesaura, Qinlingosaurus, Ravatichnus, Rotundichnus, Sanpasaurus, Tapinosaurus, Tendaguriidae, Titanosaurus lydekkeri, Titanosaurus montanus, Ultrasaurus, Vulcanodon, Zizhongosaurus
Subtaxa: none
Type: Haplocanthosaurus
Ecology: ground dwelling herbivore
Distribution: found only at Williams Slow Eagle Quarry (Jurassic of Utah)