i qi ▁B ai , ▁J ie ▁Yang ▁and ▁Gu oh ui ▁Wang , ▁along ▁with ▁its ▁type ▁and ▁only ▁species , ▁Y imen osa urus ▁young i . ▁The ▁species ▁name ▁hon ours ▁ren owned ▁Chinese ▁pale ont ologist ▁Yang ▁Zh ong j ian , ▁the ▁father ▁of ▁Chinese ▁pale ont ology , ▁known ▁as ▁C . C . ▁Young ▁in ▁English . ▁Kn own ▁material ▁includes ▁the ▁hol ot ype , ▁an ▁almost ▁complete ▁sk ull ▁and ▁mand ible , ▁as ▁well ▁as ▁incomplete ▁cer v ical ▁and ▁d ors al ▁verte bra e , ▁a ▁mostly ▁complete ▁sac rum , ▁an ▁il ium , ▁is chia , ▁partial ▁rib s ▁and ▁complete ▁fem ur , ▁and ▁a ▁par atype , ▁a ▁well - pres erved ▁post c ran ia ▁with ▁a ▁fragment ary ▁sk ull . ▁ ▁Disc overy ▁and ▁naming ▁Kn own ▁from ▁two ▁spec im ens , ▁Y imen osa urus ▁is ▁relatively ▁complete ▁for ▁its ▁type ▁of ▁sau rop od omorph . ▁The ▁spec im ens ▁were ▁described ▁originally ▁in ▁ 1 9 9 0 ▁by ▁Z i qi ▁B ai , ▁J ie ▁Yang ▁and ▁Gu oh ui ▁Wang , ▁and ▁the ▁descri bers ▁named ▁for ▁them ▁a ▁complete ▁bin omial , ▁Y imen osa urus ▁young i . ▁B ai ▁et ▁al . ▁created ▁the ▁genus ▁name ▁from ▁Y imen ▁county , ▁the ▁place ▁of ▁discovery ▁in ▁Y unn an ▁Province , ▁and ▁the ▁Latin ▁word ▁sa urus , ▁meaning ▁" re pt ile ".