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星叶属

星叶属
化石时期:石炭紀二疊紀[1]
星葉屬植物的化石
科学分类 编辑
界: 植物界 Plantae
门: 木贼门 Equisetophyta
纲: 木賊綱 Equisetopsida
目: 木贼目 Equisetales
科: 芦木科 Calamitaceae
属: 星叶属 Asterophyllites
Brongniart, 1828[1]

Asterophyllites charaeformis

星葉屬學名Asterophyllites),又名星葉木賊屬,是蘆木科下已滅絕的一個,為一類生長在沼澤地區的巨大蕨類。生存於晚石炭紀二疊紀,其化石分布於全世界。[2]

特徵

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星葉木賊為高大的樹狀蕨類。呈肋狀支撐,並從外部類似木質部的組織獲得撐力(如同竹子),以保護海綿狀的樹幹內部。枝條從莖的輪狀節處發出,孢子生成於位於某些莖部頂端之孢子囊穗(類似毬果的結構,由毬果葉及呈輪狀的孢囊緊密聚合而成)裡的孢囊梗內。形,有單獨的中間葉脈,生長在枝條的輪狀節上,使成年的星葉木賊擁有濃密的、類似針葉樹的外觀。它們能利用地下長匐莖進行無性生殖[2]

物種[1]

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  • Asterophyllites charaeformis Goeppert, 1844

參考文獻

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  1. ^ 1.0 1.1 1.2 Fossilworks: Asterophyllites. [2018-07-03]. (原始内容存档于2020-10-29) (英语). 
  2. ^ 2.0 2.1 Walker, Cyril英语Cyril Walker (palaeontologist); Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 291. ISBN 0789489848. 
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星叶属
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