Full reference: J. E. Gray. 1821. On the natural arrangement of vertebrose animals. The London Medical Repository Monthly Journal and Review 15:296-310
Parent taxon: Ceratomorpha according to M. W. Colbert 2005
See also Antoine et al. 2010, Carroll 1988, Dashzeveg 1996, Ducrocq et al. 2006, Ferrusquia-Villafranca 1969, Hay 1902, Holbrook 1999, Holbrook et al. 2004, Hooker and Dashzeveg 2004, Hough 1955, Prothero 2005 and Prothero and Schoch 1989
Sister taxa: Breviodon, Deperetellidea, Fouchia, Karagalax, Lophialetidea, Parabreviodon, Schizotheroides, Selenaletes, Tapiridea, Tapiroidea
Subtaxa: Amynodontidae Caenolophus Eggysodontidae Ergilia Huananodon Hyrachyidae Hyracodontidae Meschotherium Pakitherium Paraceratheriidae Punjabitherium Rhinocerotidae Siamolophus Symphysorrhachis Toxotherium Veragromovia
Ecology: ground dwelling browser