▁bottom ▁art icul ating ▁surface ▁of ▁its ▁hum er us . ▁Zh uch eng t itan ▁lived ▁in ▁a ▁flo od plain ▁environment ▁alongside ▁Sh ant ung osa urus , ▁Zh uch eng ty ran n us , ▁and ▁Sin oc er at ops . ▁ ▁Disc overy ▁and ▁naming ▁Zh uch eng t itan ▁is ▁known ▁from ▁a ▁single ▁hum er us ▁that ▁was ▁discovered ▁in ▁the ▁Wang sh i ▁Group ▁within ▁the ▁region ▁of ▁Zh uch eng , ▁Sh and ong , ▁China . ▁The ▁primary ▁foss il ▁local ities ▁within ▁this ▁region ▁are ▁the ▁Long gu j ian , ▁K ug ou , ▁and ▁Z ang j ia z hu ang ▁Qu ar ries . ▁In ▁ 2 0 0 8 , ▁research ers ▁from ▁the ▁Zh uch eng ▁Din osa ur ▁Culture ▁Research ▁Center ▁un cover ed ▁the ▁hum er us ▁and ▁some ▁other ▁sau rop od ▁b ones ▁at ▁the ▁Z ang j ia z hu ang ▁Qu ar ry ; ▁the ▁hum er us ▁was ▁catalog ued ▁as ▁Z J Z - 5 7 ▁at ▁the ▁Center . ▁While ▁the ▁hum er us ▁is ▁mostly ▁complete , ▁the ▁outer ▁edge ▁of ▁the ▁top ▁end , ▁all ▁edges ▁of ▁the ▁bottom ▁end ▁save ▁for ▁the ▁rear ▁edge , ▁and ▁the ▁del to pect oral ▁cr est ▁have ▁all ▁been ▁partially ▁lost ▁to ▁damage . ▁Additionally , ▁the ▁preserved ▁port ions ▁are ▁tw isted . ▁ ▁Loc ally , ▁the ▁Wang sh i ▁Group ▁is ▁further ▁divided ▁into ▁two