▁of ▁earlier ▁names ; ▁he ▁grouped ▁A pat osa urus ▁within ▁O pis th oco elia . ▁Sau rop oda ▁is ▁still ▁used ▁as ▁the ▁group ▁name . ▁In ▁ 2 0 1 1 , ▁John ▁Whit lock ▁published ▁a ▁study ▁that ▁placed ▁A pat osa urus ▁a ▁more ▁bas al ▁di pl od oc id , ▁sometimes ▁less ▁bas al ▁than ▁Sup ers aur us . ▁ ▁Cl ad ogram ▁of ▁the ▁Di pl od oc idae ▁after ▁Tsch opp , ▁Mate us , ▁and ▁B enson ▁( 2 0 1 5 ). ▁ ▁Pala e obi ology ▁ ▁It ▁was ▁believed ▁throughout ▁the ▁ 1 9 th ▁and ▁early ▁ 2 0 th ▁centuries ▁that ▁sau rop ods ▁like ▁A pat osa urus ▁were ▁too ▁massive ▁to ▁support ▁their ▁own ▁weight ▁on ▁dry ▁land . ▁It ▁was ▁the or ized ▁that ▁they ▁lived ▁partly ▁sub mer ged ▁in ▁water , ▁perhaps ▁in ▁sw amps . ▁More ▁recent ▁find ings ▁do ▁not ▁support ▁this ; ▁sau rop ods ▁are ▁now ▁thought ▁to ▁have ▁been ▁fully ▁terrest rial ▁animals . ▁A ▁study ▁of ▁di pl od oc id ▁sn outs ▁showed ▁that ▁the ▁square ▁sn out , ▁large ▁proportion ▁of ▁p its , ▁and ▁fine , ▁sub parallel ▁scratch es ▁of ▁the ▁teeth ▁of ▁A pat osa urus ▁suggests ▁it ▁was ▁a ▁ground - height , ▁non select ive ▁browser . ▁It ▁may ▁have ▁e aten ▁f ern s , ▁cy cade oid s , ▁seed ▁f ern s , ▁hor set ails