Wood anatomy of Late Triassic trees in Petrified Forest National Park, Arizona, USA, in relation to Araucarioxylon arizonicum Knowlton, 1889

Bulletin of geosciences

Savidge RA¹ 

关键词: Triassic;    Pinophyta;    Araucaria-type wood;    North America;    oculipore;    Protopiceoxylon novum;    ray;    resin canal;    resinous tracheid;    secondary xylem;    tracheidoxyl;    new taxa;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

ThinsectionsfromthethreesyntypesofAraucarioxylonarizonicumKnowlton,1889werere-examinedandfoundtobeanatomicallydistinct.Twoofthesyntypesaresimilarand,consideringAraucarioxylon(“Araucaroxylon”)Kraus,1870asnomensuperfluum,thosetwoareplacedinPullisilvaxylongen.n.asnomennovum(lectotypePullisilvaxylonarizonicum).Thethirdspecimen,knownasthe‘Shermanlog’,istransferredtoChinleoxylonknowltoniigen.etsp.n.Permineralizedwoodsinthreerandomlysampledlarge-diameterlogsassumedtobeA.arizonicumplesiotypeswerefoundtobeanatomicallydistinct,twobeingspecieswithinSilicisilvaxylongen.n.,thethirdnamedCrystalloxylonimprimacrystallumgen.etsp.n.Thus,followingdescriptionsofArboramosasemicircumtracheaSavidgeAsh,2006,ProtocupressinoxylonarizonicumSavidge,2006,andGinkgoxylpropinquushewardiiSavidge,2006,thisstudyfurtherincreasestheregion’snumberofwoodyplantmorphotaxaandindicatesthatadiversityoflargeconiferspecieswereco-evolvingwithcycadsandginkgo-liketreesduringLateTriassic.

【 授权许可】

Unknown