†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

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Ecology: ground dwelling browser

Distribution:

• Eocene of United States (58: Colorado, Montana, Wyoming collections)

Total: 58 collections including 65 occurrences

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