▁Although ▁it ▁was ▁De in ony chus ▁that ▁inspired ▁Ost rom ▁to ▁connect ▁birds ▁with ▁din osa urs , ▁very ▁similar ▁bird like ▁din osa urs , ▁such ▁as ▁V elo ci ra pt or , ▁had ▁been ▁known ▁for ▁many ▁dec ades , ▁but ▁no ▁connection ▁had ▁been ▁made . ▁After ▁Ost rom ' s ▁discover ies , ▁the ▁idea ▁that ▁birds ▁evol ved ▁from ▁din osa urs ▁gained ▁support ▁among ▁p ala e ont olog ists , ▁and ▁today ▁it ▁is ▁almost ▁univers ally ▁accepted . ▁Ne wer ▁methods , ▁such ▁as ▁cl ad istics , ▁and ▁the ▁discovery ▁of ▁several ▁fe ather ed ▁din osa urs ▁have ▁helped ▁confirm ▁the ▁relationship . ▁ ▁The ▁relationship ▁between ▁din osa urs ▁and ▁birds ▁has ▁led ▁to ▁considerable ▁interest ▁in ▁din osa ur — part icular ly ▁ther op od — phy log eny , ▁which ▁is ▁now ▁far ▁better ▁understood . ▁ ▁Din osa ur ▁mon oph y ly ▁▁ ▁Initial ly , ▁din osa urs ▁were ▁thought ▁to ▁be ▁a ▁mon oph y let ic ▁group , ▁compr ising ▁animals ▁with ▁a ▁common ▁ancest or ▁not ▁shared ▁by ▁other ▁re pt iles . ▁However , ▁Harry ▁See ley ▁disag re ed ▁with ▁this ▁interpretation , ▁and ▁split ▁the ▁Din osa uria ▁into ▁two ▁orders , ▁the ▁Sa ur isch ia ▁(" l izard - hi pped ") ▁and ▁the ▁Or n ith isch ia ▁(" bird - hi pped "), ▁which ▁were ▁seen ▁as ▁members ▁of ▁the ▁Arch osa uria ▁with