楔羊齿
真蕨或种子蕨植物叶化石的一形态属。多次羽状复叶。小羽片形状变化很大，大都较小而窄，呈楔形或圆形，边缘常裂成几个裂片，基部收缩呈柄状，着生在轴上。叶脉羽状或近扇状，主要呈二歧合轴式分叉，中脉较弱，有时曲折，侧脉分叉。晚泥盆世至白垩纪，繁盛于石炭纪、二叠纪，世界各地。中国主要产于石炭系、二叠系。晚三叠世及侏罗纪地层中也有产出。
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Contributor
contributed at 2011-10-11
Classification(s)
●
Earth System(in Chinese) Paleontology
Detailed Description
| English |
|---|
| Name | Sphenopteris |
| Chinese |
|---|
| Name | 楔羊齿 |
| Description | 真蕨或种子蕨植物叶化石的一形态属。多次羽状复叶。小羽片形状变化很大，大都较小而窄，呈楔形或圆形，边缘常裂成几个裂片，基部收缩呈柄状，着生在轴上。叶脉羽状或近扇状，主要呈二歧合轴式分叉，中脉较弱，有时曲折，侧脉分叉。晚泥盆世至白垩纪，繁盛于石炭纪、二叠纪，世界各地。中国主要产于石炭系、二叠系。晚三叠世及侏罗纪地层中也有产出。 |
How to Cite
NNU_Group (2011). 楔羊齿, Concept & Semantic, OpenGMS,
https://geomodeling.njnu.edu.cn/repository/concept/3386e90e-3f0e-49bc-89d8-213a045158e3
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