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1、AdvancesinGeosciences地球科学前沿,2016,6(5),355-360PublishedOnlineOctober2016inHans.http://www.hanspub.org/journal/aghttp://dx.doi.org/10.12677/ag.2016.65037DiscoveryoftheEarlyCretaceousAnkylosaurGastrolithsandScaleImpressionsfromtheOrdosBasin,InnerMongolia,ChinaShu’anJi1*,ShanJiang2,LifuZhang3,Ji
2、anqiangHao41KeyLaboratoryofStratigraphyandPaleontology,MinistryofLandandResources,andInstituteofGeology,ChineseAcademyofGeologicalSciences,Beijing2NaturalHistoryMuseumofGuangxi,NanningGuangxi3AdministrationoftheOtogDinosaurTraceNationalNatureReserve,OtogInnerMongolia4InnerMongoliaGeneralTeam
3、,ChinaBuildingMaterialGeologyInvestigationCenter,HuhhotInnerMongoliathththReceived:Oct.5,2016;accepted:Oct.24,2016;published:Oct.27,2016Copyright©2016byauthorsandHansPublishersInc.ThisworkislicensedundertheCreativeCommonsAttributionInternationalLicense(CCBY).http://creativecommons.org/licens
4、es/by/4.0/OpenAccessAbstractTheEarlyCretaceousterrestrialZhidanGroupoftheOrdosBasin,InnerMongoliaproducedab-undantfossilvertebratesincludingseveraldinosaurgroupssuchastheropods,stegosaursandpsittacosaurids.Recently,anincompleteankylosaurskeletonhasbeenfoundfromtheLuohan-dongFormationatLaolon
5、ghuozisite,HangjinQi.Fortunately,aclusterofgastrolithsandsomeareaofscaleimpressionsareclearlypreserved.Atleast22pebblesarepresentedatthepositionjustaheadofsynsacrum.Theyarehardandrounded,witheachpebbleroughly20millimetersto35millimetersinlongaxis.Thesepebblesshouldbeinterpretedasgastroliths(
6、stomachstones).Morethan40squarecentimetersofscaleimpressionsareexposednearthecervicalvertebrae.Eachscaleisgenerallytrapezoidinoutline,withtheareavaryingfrom6squaremillimetersto12squaremillimeters.Thesescalesaresmallandseparate,comparedwiththerelativelylargeandvariousshapedosteodermsinankylos
7、aurs.ThisspecimenrepresentsnotonlythefirstfindingofankylosaurdinosaursamongtheEarlyCretaceousvertebratefaunainOrdosBasin,butalsothefirstexampleoftheankylosaurgastrolithsandscaleimpressionsinChina.KeywordsAnkylosaurs,Gastroliths,ScaleImpressions,Ear
