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The cladoxylopsids are a group of plants known only as fossils that are thought to be ancestors of ferns and horsetails. They had a central trunk, from the top of which several lateral branches were attached. Fossils of these plants originate in the Middle Devonian to Early Carboniferous periods (around ), mostly just as stems. Cladoxylopsida contains two orders. The order Hyeniales is now included in Pseudosporochnales.〔Thomas N. Taylor, Edith L. Taylor, Michael Krings: Paleobotany. The Biology and Evolution of Fossil Plants . Second Edition, Academic Press 2009, ISBN 978-0-12-373972-8 , p. 387-401, 1028〕 Intact fossils of the Middle Devonian cladoxylopsid ''Wattieza'' show it to have been a tree, the earliest identified in the fossil record as of 2007. ==References== *(UC Museum of Palentology ) *Stein, W. E., F. Mannolini, L. V. Hernick, E. Landling, and C. M. Berry. 2007. (Giant cladoxylopsid trees resolve the enigma of the Earth's earliest forest stumps at Gilboa ). Nature, 446:904-907. 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「Cladoxylopsida」の詳細全文を読む スポンサード リンク
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