†subfamily Palaeosyopinae Steinmann and Döderlein 1890 (brontothere)
Mammalia - Perissodactyla - Brontotheriidae
Parent taxon: Brontotheriidae according to B. J. Mader 2010
See also Hay 1902, Mader 1998 and Mihlbachler 2008
Sister taxa: Balochititanops, Brontopinae, Brontotheriinae, Danjiangia, Embolotheriinae, Eotitanopinae, Epimanteoceratinae, Lambdotherium, Menodontidae, Metatelmatherium, Mulkrajanops, Pakotitanops, Sivatitanops, Sthenodectes, Xylotitan
Subtaxa: Palaeosyops
Ecology: ground dwelling browser
Distribution: