astr icht ian , ▁about ▁ 6 9 ▁million ▁years ▁ago . ▁It ▁was ▁first ▁named ▁by ▁Robert ▁M . ▁S ull ivan , ▁Steven ▁E . ▁Jas in ski ▁and ▁Mark ▁P . A . ▁van ▁Tom me ▁in ▁ 2 0 1 1 ▁and ▁the ▁type ▁species ▁is ▁O jor apt ors aur us ▁bo erei . ▁The ▁generic ▁name ▁comb ines ▁a ▁reference ▁to ▁the ▁formation ▁with ▁a ▁Latin ▁ra pt or , ▁" pl under er ", ▁and ▁a ▁Latin ised ▁Greek ▁sa urus , ▁" l izard ". ▁The ▁specific ▁name ▁hon ours ▁ocean ograph er ▁Ar jan ▁Bo er é ▁who ▁found ▁the ▁spec imen . ▁ ▁Description ▁ ▁The ▁hol ot ype ▁of ▁O jor apt ors aur us ▁is ▁S MP   VP - 1 4 5 8 , ▁an ▁incomplete ▁pair ▁of ▁f used ▁pub es . ▁Due ▁to ▁the ▁fusion ▁of ▁the ▁pub es , ▁this ▁spec imen ▁is ▁believed ▁to ▁have ▁been ▁a ▁m ature ▁individual . ▁Most ▁ca en agn ath id ▁species ▁are ▁known ▁from ▁very ▁few ▁remains , ▁and ▁O jor apt ors aur us ▁is ▁no ▁exception . ▁The ▁hol ot ype ▁was ▁compared ▁to ▁well - des cribed ▁pub ic ▁remains ▁of ▁other ▁o vi ra pt or osa uri ans , ▁namely ▁Micro ven ator , ▁Ep ich iro sten otes , ▁Nom ing ia , ▁and ▁C M ▁ 7 8 0 0 1 ▁( now ▁known ▁as ▁An zu ). ▁It ▁shares ▁with ▁the