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首页> 外文期刊>International journal of plant sciences >EVOLUTION AND RELATIONSHIPS OF THE CONIFER SEED CONE TELEMACHUS: EVIDENCE FROM THE TRIASSIC OF ANTARCTICA
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EVOLUTION AND RELATIONSHIPS OF THE CONIFER SEED CONE TELEMACHUS: EVIDENCE FROM THE TRIASSIC OF ANTARCTICA

机译：锥果圆锥形线虫的进化与关系：来自南极三叠纪的证据

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摘要

The seed cone Telemachus is known from several Triassic localities in Gondwana. New specimens from two localities in Antarctica provide additional information about the type species, Telemachus elongatus, based on details of morphology and anatomy revealed by using a modified transfer technique on the compressed plants. Seed cones of T. elongatus are up to 6.0 cm long and characterized by conspicuous, elongate bracts. A second Antarctic species, described here as Telemachus antarcticus, is segregated, based on a shorter bract and differences in cone size. Newly recognized features of the genus include the shape, size, and disposition of the ovules; vascularization of the ovuliferous complex; and scale and bract histology. As a result of this new information, it is now possible to compare Telemachus with the permineralized Middle Triassic conifer seed cone Farasciadopitys from the Central Transantarctic Mountains. The similarities between the two genera make it possible to relate organs in different preservational modes and to develop a more complete concept for this widely distributed Gondwana conifer. Placing the Telemachus plant within a phylogenetic context makes it possible to evaluate the relationship with other so-called transitional conifers, an informal group that has been interpreted as intermediate between Paleozoic and modern conifers.
机译：刚德纳的几个三叠纪地区都知道锥果Telemachus。来自南极洲两个地方的新标本根据形态和解剖学的详细信息，提供了有关该类型种的额外信息，即长形龙（Telemachus elongatus），这是通过在压缩植物上使用改良的转移技术揭示的。伸长的丁香球果长达6.0厘米，其特征是明显，细长的characterized片。基于较短的shorter片和视锥大小的差异，隔离了第二个南极物种，此处称为Telemachus antarcticus。该属的新发现特征包括胚珠的形状，大小和分布。卵泡复合物的血管化；规模和片组织学。有了这些新信息，现在就可以将Telemachus与中跨南极山脉的矿化中三叠世针叶树种子锥Farasciadopitys进行比较。这两个属之间的相似性使得有可能以不同的保存方式关联器官，并为这种广为传播的冈瓦纳针叶树开发出更完整的概念。将Telemachus植物放置在系统发育的背景下，就可以评估与其他所谓的过渡针叶树的关系，过渡针叶树是一个非正式群体，被认为是古生代和现代针叶树之间的中间人。

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  • 来源
    《International journal of plant sciences》 |2010年第5期|560-573|共14页
  • 作者

    Ignacio H. Escapa; Anne-Laure Decombeix; Edith L. Taylor; Thomas N. Taylor;

  • 作者单位

    Department of Ecology and Evolutionary Biology and Natural History Museum and Biodiversity Institute, University of Kansas, Lawrence, Kansas 66045-7600, U.S.A.;

    Department of Ecology and Evolutionary Biology and Natural History Museum and Biodiversity Institute, University of Kansas, Lawrence, Kansas 66045-7600, U.S.A.;

    Department of Ecology and Evolutionary Biology and Natural History Museum and Biodiversity Institute, University of Kansas, Lawrence, Kansas 66045-7600, U.S.A.;

    Department of Ecology and Evolutionary Biology and Natural History Museum and Biodiversity Institute, University of Kansas, Lawrence, Kansas 66045-7600, U.S.A.;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Triassic; Antarctica; conifers; Telemachus; evolution;

    机译：三叠纪;南极洲;针叶树Telemachus;演化;
  • 入库时间 2022-08-18 03:45:40

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