珠角石亚纲
头足纲的一亚纲。多为直形壳，中等大至巨大。体管多较大，可达壳体直径的1/2，位于壳的近中心或近腹部，具独特的环珠沉积。隔壁颈多短而弯曲，体管节向气室方向膨胀，呈串珠状，一般宽大于长，也有长大于宽或近球状者。气室沉积发育。奥陶纪至石炭纪。奥陶系化石多而重要，如阿门角石(Armenoceras)、多泡角石(Polydesmia)、链角石(Ormoceras)等。
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contributed at 2011-10-11
Classification(s)
●
Earth System(in Chinese) Paleontology
Detailed Description
| English |
|---|
| Name | Actinoceratoidea |
| Chinese |
|---|
| Name | 珠角石亚纲 |
| Description | 头足纲的一亚纲。多为直形壳，中等大至巨大。体管多较大，可达壳体直径的1/2，位于壳的近中心或近腹部，具独特的环珠沉积。隔壁颈多短而弯曲，体管节向气室方向膨胀，呈串珠状，一般宽大于长，也有长大于宽或近球状者。气室沉积发育。奥陶纪至石炭纪。奥陶系化石多而重要，如阿门角石(Armenoceras)、多泡角石(Polydesmia)、链角石(Ormoceras)等。 |
How to Cite
NNU_Group (2011). 珠角石亚纲, Concept & Semantic, OpenGMS,
https://geomodeling.njnu.edu.cn/repository/concept/df7a1188-eb16-430e-a385-1b997166b807
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