▁its ▁own ▁tax on . ▁However , ▁Y PM 1 8 6 1 ▁and ▁NS MT - P V ▁ 2 0 3 7 5 ▁only ▁differ ed ▁in ▁a ▁few ▁characteristics , ▁and ▁cannot ▁be ▁distinguished ▁specifically ▁or ▁gener ically ▁from ▁A . ajax . ▁Y PM 1 8 6 1 ▁is ▁the ▁hol ot ype ▁of ▁" At lant osa urus " ▁im man is , ▁which ▁means ▁it ▁might ▁be ▁a ▁junior ▁syn onym ▁of ▁A . ajax . ▁A pat osa urus ▁l ou is ae ▁was ▁named ▁by ▁Holland ▁in ▁ 1 9 1 6 , ▁being ▁first ▁known ▁from ▁a ▁partial ▁ske leton ▁that ▁was ▁found ▁in ▁Ut ah . ▁The ▁hol ot ype ▁is ▁C M 3 0 1 8 , ▁with ▁referred ▁spec im ens ▁including ▁C M 3 3 7 8 , ▁C M 1 1 1 6 2 , ▁and ▁L AC M 5 2 8 4 4 . ▁The ▁former ▁two ▁consist ▁of ▁a ▁verte br al ▁column ; ▁the ▁latter ▁two ▁consist ▁of ▁a ▁sk ull ▁and ▁a ▁nearly ▁complete ▁ske leton , ▁respectively . ▁A pat osa urus ▁l ou is ae ▁spec im ens ▁all ▁come ▁from ▁the ▁late ▁Kim mer id g ian ▁of ▁Din osa ur ▁National ▁Monument . ▁In ▁ 2 0 1 5 ▁Tsch opp ▁et al . ▁found ▁the ▁type ▁spec imen ▁of ▁A pat osa urus ▁l atic oll is ▁to ▁nest ▁closely ▁with ▁C M 3 0 1 8 , ▁meaning ▁the