", ▁a ▁reference ▁to ▁the ▁animal ' s ▁memb ran ous ▁wings ▁and ▁bird - like ▁body ▁plan . ▁The ▁specific ▁name ▁long ib rach ium ▁is ▁derived ▁from ▁the ▁Latin ▁words ▁long us ▁meaning ▁" long " ▁and ▁bra ch ium ▁meaning ▁" upper ▁arm ". ▁ ▁Hol ot ype ▁The ▁hol ot ype ▁spec imen , ▁IV PP ▁V 2 4 1 9 2 , ▁is ▁an ▁art ic ulated ▁and ▁nearly ▁complete ▁ske leton ▁with ▁associated ▁soft ▁t issue ▁preserved ▁on ▁a ▁sl ab ▁and ▁a ▁counter ▁sl ab . ▁It ▁was ▁recovered ▁in ▁ 2 0 1 7 ▁from ▁the ▁strat ig raph ic ▁equivalent ▁of ▁the ▁Ha if ang g ou ▁Form ation ▁near ▁W uba iding ▁Village ▁in ▁the ▁L ia oning ▁Province ▁and ▁belongs ▁to ▁the ▁Yan lia o ▁Bi ota . ▁ ▁The ▁wing ▁memb rane ▁is ▁preserved ▁as ▁a ▁continuous ▁brown ish ▁layer ▁on ▁the ▁matrix ▁surrounding ▁the ▁left ▁hand , ▁right ▁for el imb , ▁and ▁ab d omen . ▁The ▁head , ▁neck , ▁and ▁shoulder ▁regions ▁are ▁covered ▁with ▁dense ▁layers ▁of ▁fe ather . ▁ ▁Description ▁Like ▁other ▁sc ans ori opter yg ids , ▁Amb opter y x ▁had ▁a ▁short , ▁bl unt ▁head ▁and ▁a ▁hyper - el ong ate ▁third ▁finger . ▁It ▁was ▁previously ▁believed ▁that ▁sc ans ori opter yg ids ▁used ▁their ▁third ▁finger ▁to ▁extract ▁gr ubs ▁from ▁wood , ▁like ▁the ▁ext ant ▁a ye - aye . ▁However , ▁Wang