oter ▁Tom ▁But t ▁profile ▁ ▁Category : L iving ▁people ▁Category : Activ ists ▁from ▁the ▁San ▁Francisco ▁Bay ▁Area ▁Category : Rich mond ▁City ▁Council ▁members ▁( Cal iforn ia ) ▁Category : Arch itect s ▁from ▁California ▁Category : May ors ▁of ▁Richmond , ▁California ▁Category : 2 1 st - century ▁American ▁polit icians ▁Category : 1 9 4 4 ▁birth s <0x0A> </s> ▁Amb opter y x ▁( mean ing ▁" both ▁wing ") ▁is ▁a ▁genus ▁of ▁sc ans ori opter yg id ▁din osa ur ▁from ▁the ▁Oxford ian ▁stage ▁of ▁the ▁Late ▁Jur ass ic ▁of ▁China . ▁It ▁is ▁the ▁second ▁din osa ur ▁to ▁be ▁found ▁with ▁both ▁fe athers ▁and ▁bat - like ▁memb ran ous ▁wings . ▁Y i , ▁the ▁first ▁such ▁din osa ur , ▁was ▁described ▁in ▁ 2 0 1 5 ▁and ▁is ▁the ▁sister ▁tax on ▁to ▁Amb opter y x . ▁The ▁hol ot ype ▁spec imen ▁is ▁thought ▁to ▁be ▁a ▁sub - ad ult ▁or ▁adult . ▁The ▁spec imen ▁is ▁estimated ▁to ▁have ▁had ▁a ▁body ▁length ▁of ▁ ▁and ▁a ▁weight ▁of ▁. ▁The ▁genus ▁includes ▁one ▁species , ▁Amb opter y x ▁long ib rach ium . ▁ ▁Et ym ology ▁The ▁generic ▁name ▁Amb opter y x ▁is ▁derived ▁from ▁the ▁Latin ▁word ▁am bo ▁meaning ▁" both " ▁and ▁An cient ▁Greek ▁word ▁ π τ έ ρ υ ξ ▁( p tery x ) ▁meaning ▁" wing