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首页> 外文期刊>International journal of plant sciences >LATE CRETACEOUS ANGIOSPERM WOODS FROM THE CREVASSE CANYON AND MCRAE FORMATIONS, SOUTH-CENTRAL NEW MEXICO, USA: PART 1
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LATE CRETACEOUS ANGIOSPERM WOODS FROM THE CREVASSE CANYON AND MCRAE FORMATIONS, SOUTH-CENTRAL NEW MEXICO, USA: PART 1

机译：美国新墨西哥州中南部的裂谷峡谷和麦克雷地层的晚白垩纪被子植物木材

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摘要

Late Cretaceous angiosperm woods from the Western Interior of North America are poorly known relative to palynomorphs and leaf macrofossils. In this report we describe angiosperm woods from the Campanian Crevasse Canyon Formation and the Maastrichtian Jose Creek Member of the McRae Formation, in south-central New Mexico. New taxa include Baasia armendarisense (Celastraceae), Fulleroxylon armendarisense (Myrtaceae), and Pygmaeoxylon paucipora (magnoliid of uncertain affinities). Previously described taxa include Metcalfeoxylon (eudicots), Paraphyllanthoxylon (most likely Laurales), and Platanoxylon (Platanaceae). Tree habit is indicated for Metcalfeoxylon, which is known from in situ stumps with a maximum basal diameter of 0.75 m, and for Baasia and Paraphyllanthoxyon, which are known from axes at least 0.14 m in diameter. Baasia and Fulleroxylon represent the first North American fossil wood records of Celastraceae and Myrtaceae, respectively. Baasia also indicates that within Celastraceae, the pattern of alternating regions of thick- and thin-walled fibers originated during the Cretaceous.
机译：相对于古植物和叶片大型化石，来自北美西部内陆的晚白垩纪被子植物木材知之甚少。在本报告中，我们描述了新墨西哥州中南部的Campanian裂隙峡谷地层的被子植物和McRae地层的Maastrichtian Jose Creek成员。新的分类群包括Baasia armendarisense（Celastraceae），Fulleroxylon armendarisense（Myrtaceae）和Pygmaeoxylon paucipora（不确定亲和力的木兰）。先前描述的分类单元包括Metcalfeoxylon（双子叶植物），Paraphyllanthoxylon（最可能是Laurales）和Platanoxylon（伞形科）。 Metcalfeoxylon（从最大基径为0.75 m的原位树桩中获知）以及Baasia和Paraphyllanthoxyon（从直径至少为0.14 m的轴中获知）已知有树习性。 Baasia和Fulleroxylon分别代表了北美最早的Celastraceae和Myrtaceae的化石记录。 Baasia还表明，在Celastraceae中，厚壁和薄壁纤维交替区域的模式起源于白垩纪。

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