▁Creek ▁Member ▁is ▁a ▁composed ▁of ▁oil ▁sh ales ▁from ▁a ▁shall ow ▁mountain ▁lake ▁that ▁exists ▁for ▁around ▁ 2 0 ▁million ▁years . ▁Study ▁of ▁the ▁pale of l ora ▁preserved ▁in ▁the ▁sh ales ▁indicates ▁the ▁lake ▁was ▁around ▁ ▁in ▁elev ation ▁surrounded ▁by ▁a ▁tropical ▁to ▁subt rop ical ▁environment ▁that ▁had ▁a ▁distinct ▁dry ▁season . ▁ ▁At ▁the ▁time ▁of ▁study , ▁the ▁hol ot ype ▁was ▁part ▁of ▁the ▁Division ▁of ▁Ent om ology ▁( P ale o ent om ology ) ▁collections , ▁University ▁of ▁Kansas ▁Natural ▁History ▁Museum . ▁ ▁It ▁was ▁first ▁studied ▁by ▁an ▁international ▁team ▁of ▁research ers ▁head ed ▁by ▁Manuel ▁De hon ▁of ▁the ▁University ▁of ▁M ons , ▁Belg ium , ▁with ▁the ▁teams ▁ 2 0 1 4 ▁type ▁description ▁of ▁the ▁genus ▁and ▁species ▁was ▁published ▁in ▁the ▁natural ▁sciences ▁journal ▁PL OS ▁One . ▁ ▁The ▁genus ▁name ▁is ▁a ▁derived ▁from ▁a ▁combination ▁of ▁the ▁Eug loss ini ▁type ▁genus ▁Eug loss a ▁combined ▁with ▁the ▁Greek ▁" p tery x " ▁meaning ▁wing . ▁This ▁is ▁a ▁reference ▁to ▁the ▁similarity ▁between ▁Eug loss opter y x ▁b ies me ij eri ▁and ▁species ▁of ▁Eug loss a . ▁ ▁The ▁specific ▁ep ith et ▁b ies me ij eri ▁was ▁co ined ▁as ▁a ▁patron ym ▁hon oring ▁the ▁Belg ian ▁mel itt ologist ▁Jacob us ▁B ies me ij er , ▁who ▁is ▁a ▁noted ▁research er ▁of ▁pol lin