▁ ▁Origin ally ▁it ▁was ▁known ▁from ▁only ▁one ▁spec imen , ▁but ▁ 1 8 9 ▁new ▁finds ▁in ▁the ▁years ▁immediately ▁preceding ▁ 2 0 0 6 ▁made ▁a ▁detailed ▁description ▁possible . ▁() ▁As ▁a ▁result , ▁Od ont og ri ph us ▁has ▁become ▁prominent ▁in ▁the ▁debate ▁that ▁has ▁gone ▁on ▁since ▁ 1 9 9 0 ▁about ▁the ▁evolution ary ▁orig ins ▁of ▁m oll us cs , ▁ann el id ▁w orm s ▁and ▁bra chi op ods . ▁A ▁group ▁of ▁scient ists ▁think ▁that ▁Od ont og ri ph us ’ s ▁feed ing ▁appar atus , ▁which ▁is ▁" near ly ▁identical " ▁to ▁W iw ax ia ’ s , ▁is ▁an ▁early ▁version ▁of ▁the ▁m oll us can ▁rad ula , ▁a ▁ch it in ous ▁" t ong ue " ▁that ▁be ars ▁multiple ▁rows ▁of ▁r asp ing ▁teeth . ▁Hence ▁they ▁class ify ▁Od ont og ri ph us ▁and ▁W iw ax ia ▁as ▁close ▁to ▁the ▁ancest ors ▁of ▁the ▁first ▁true ▁m oll us cs . ▁One ▁scient ist ▁has ▁presented ▁a ▁different ▁analysis , ▁arg uing ▁since ▁ 1 9 9 0 ▁that ▁W iw ax ia ▁is ▁not ▁closely ▁related ▁to ▁m oll us cs ▁but ▁is ▁much ▁more ▁like ▁a ▁pol ych a ete ▁w orm . ▁He ▁arg ues ▁that ▁the ▁supposed ▁" rad ula " ▁is ▁nothing ▁of ▁the ▁sort ; ▁he ▁class ifies ▁Od ont og ri ph