Bulletin of geosciences | |
Wood anatomy of Late Triassic trees in Petrified Forest National Park, Arizona, USA, in relation to Araucarioxylon arizonicum Knowlton, 1889 | |
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(“Araucaroxylonâ€)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
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