▁size , ▁but ▁its ▁che ek te eth ▁are ▁not ▁as ▁high - c rown ed . ▁A .   s av age i ▁shows ▁a ▁series ▁of ▁tra its ▁that ▁are ▁characteristic ▁for ▁the ▁a pe omy ines : ▁high - c rown ed ▁che ek te eth ▁with ▁thick ▁en am el ▁that ▁are ▁bil oph od ont ▁( div ided ▁into ▁two ▁lo bes ) ▁in ▁form ▁and ▁a ▁very ▁long ▁di ast ema ▁( g ap ) ▁between ▁the ▁lower ▁in cis or ▁and ▁che ek te eth . ▁However , ▁the ▁che ek te eth ▁are ▁higher - c rown ed ▁than ▁those ▁of ▁other ▁a pe omy ines , ▁including ▁A pe om ys , ▁M ega pe om ys , ▁and ▁A rik are e om ys , ▁and ▁they ▁are ▁rect angular ▁in ▁shape , ▁while ▁other ▁a pe omy ines ▁have ▁bar rel - sh aped ▁teeth . ▁Similarly , ▁the ▁oldest ▁a pe omy ine , ▁Z op ho ape om ys , ▁is ▁smaller ▁and ▁has ▁lower - c rown ed ▁che ek te eth . ▁The ▁known ▁material ▁of ▁A pe om yo ides ▁consists ▁of ▁a ▁number ▁of ▁fragment ary ▁mand ibles ▁( lower ▁j aws ) ▁and ▁isolated ▁che ek te eth . ▁The ▁length ▁of ▁the ▁first ▁and ▁second ▁lower ▁mol ars ▁( m 1 ▁and ▁m 2 ) ▁ranges ▁from ▁ 1 . 7 4 ▁to ▁ 2 . 5 8   mm , ▁the ▁width ▁from