羊角蕨
羊角蕨 化石時期: 泥盆紀早期 PreЄ Є O S D C P T J K Pg N ↓ | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Horneophyton lignieri的復原圖 | ||||||||||||||
科學分類 | ||||||||||||||
| ||||||||||||||
種 | ||||||||||||||
|
羊角蕨(學名:Horneophyton),又名何氏裸蕨、鹿角蕨、角蕨,是一屬已滅絕的原始陸生有胚植物,生存於古生代泥盆紀早期。它們可能是角苔門和萊尼蕨門之間在演化上失落的環節。它們生長在潮濕地區富含有機質的砂質土壤中,通常為單獨生長。[3]
特徵
孢子體階段的羊角蕨高約20釐米,莖的直徑約2毫米,沒有真正的維管組織,表皮有氣孔但很少見。[1]
參考文獻
^ 1.01.1 Kenrick, Paul & Crane, Peter R., The Origin and Early Diversification of Land Plants: A Cladistic Study, Washington, D.C.: Smithsonian Institution Press, 1997, ISBN 978-1-56098-730-7
^ Barghoorn, E.S. & Darrah, W.C., Horneophyton a necessary change of name for Hornea, Harvard University Botanical Museum Leaflets, 1938, 6: 142–4
^ Selden, P.A. & Nudds, J.R., Fenster zur Evolution : Berühmte Fossilfundstellen der Welt, München: Elsevier Spektrum Akademischer Verlag, 2006, ISBN 978-3-8274-1771-8
外部連結
Horneophyton at the University of Aberdeen. Includes images. (The apparent size of the corms in the reconstruction is inconsistent with the cross-sections shown earlier. See Weiss, H.-J., Chert News: Other errors and mistakes in palaeontology literature, (原始内容存档于2011-03-18) .)
Cladogram from Crane,Herendeen & Friis(2004)