†Gnathotitan Granger and Gregory 1943 (brontothere)
Mammalia - Perissodactyla - Brontotheriidae
Parent taxon: Brontotheriidae according to R. L. Carroll 1988
Sister taxa: Acrotitan, Arctotitan, Balochititanops, Brachydiastematherium, Brontops, Brontotheriinae, Desmatotitan, Dianotitan, Dolichorhininae, Dolichorhinoides, Eotitanopinae, Eotitanops, Eotitanotherium, Epimanteoceras, Hyotitan, Lambdotherium, Megacerops, Menops, Metatelmatherium, Metatitan, Microtitan, Mulkrajanops, Nanotitanops, Notiotitanops, Pachytitan, Pakotitanops, Palaeosyopinae, Parabrontops, Protembolotherium, Protitan, Protitanotherium, Pseudodiplacodon, Rhinotitan, Sivatitanops, Sthenodectes, Titanodectes, Embolotheriinae
Subtaxa: none
Ecology: ground dwelling browser