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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Tietea singularis ： ウィキペディア英語版 Tietea singularis ''Tietea singularis'' was a Marattialean tree fern from the Late Carboniferous–Permian which grew up to 12m in height. It is estimated to represent close to 90% of some fossil assemblages in Brazil.〔Rössler & Galtier (2002a)〕〔Petrified Wood Museum: (The Anatomy of Arborescent Plant Life Through Time )〕 ''Tietea singularis'' stems usually are less than 20 cm in diameter, bearing four orthostichies of leaves in a decussate arrangement. The stem is surrounded by a continuous ring of sclerenchyma that separates it from the root mantle.〔Herbst, 1986〕 ''T. singularis'' stem transverse sections have the same basic structure as Psaronius, but are composed of central vascular bundles having smaller, O- and C-shaped forms, or wavy segments having a short, rounded or fat configuration. Leaf traces are polymeristelic in Tietea, while they are monomeristelic in Psaronius.〔Petrified Wood Museum: (Tietea vs. Psaronius )〕 The Tietea root mantle is composed of polyarch roots embedded in a parenchymatous tissue that is produced both by the stem and the roots.〔Edith L. Taylor, Thomas N. Taylor, Michael Krings: ''Paleobotany: The Biology and Evolution of Fossil Plants'' (2009), page 425〕 The preserved examples from Pedra do Fogo Formation, in the Maranhão Basin (northeastern Brazil, near Araguaína) exhibit remarkable cell preservation and exquisite coloration. Much of the recovered wood material from this formation is of the tree ferns Psaronius and ''T. singularis'', with fewer examples of the fossilized stems being of Calamites. Conifers such as Dadoxylon are also found. ''Tietea singularis'' is also seen abundantly in the Motuca Formation, Parnaíba Basin in Filadélfia, Tocantins. In 2000, the área of the Motuca formation was transformed in a State park, the Monumento Natural das Árvores Fossilizadas-MONAF (Tocantins Fossil Trees Natural Monument).〔Dissertation: (Study of marattiales in the Tocantins Fossilized Forest )〕〔FAPESP Research Magazine, (Edition 210 - August 2013 )〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tietea singularis」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.