First Furongian (late Cambrian) trilobites from the Cantabrian Zone (north-western Spain)

Bulletin of geosciences

Sá AA¹  Gutiérrez-Marco JC¹  García-Bellido DC¹  Bernárdez E¹  Acenolaza GF¹  Rábano I¹  Albani R¹ 

关键词: Cambrian;    Furongian;    trilobites;    trace fossils;    Cantabrian Zone;    Spain;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

ThefirstFurongiantrilobitesaredescribedhereinfromtheCambrianoftheCantabrianZone,NWSpain.Theywerecollectedduringtheconstructionofthe“TúnelOrdovícicodelFabar”fromtheshalesof“ElFabarBeds”intheLaMatosamemberoftheBarriosFormation.TheassemblageincludestheaphelaspidinegenusMaladioidella,withaspecimenidentifiedasM.cf.colcheni,aspeciespreviouslyknownfromSierradelaDemanda(Spain),andpossiblySardiniaandOman.Fragmentsofanindeterminateolenidtrilobiteandphyllocaridcrustaceanshavealsobeenrecorded.Basedontheacritarchassemblage,thesebedsareconsideredaslateJiangshanianorearliestStage10oftheCambrianSystem.TheichnofossilCruzianasemiplicatahasalsobeencollectedinthetunnelfromtheupperpartoftheLiguuml;eriaMember(Tremadocian)oftheBarriosFormation,clearlypostdatingtheoccurrenceofMaladioidellacolcheni,itssupposedtracemarkeraccordingtosomeauthors.Theseparaterecordofbothtaxa(aFurongiantrilobiteandaCambro-Ordoviciantracefossil)doesnotsupportthisstatement,sotheirrelationshipwouldberefutedinthiscase.

【 授权许可】

Unknown