掘足纲
软体动物门的一纲。体细长，两侧对称，头不发育，角贝无眼，腹面伸出一锥状足，作掘泥沙之用，故名掘足。体外被钙质锥状壳，壳微弯曲，两端开口，前口大，后端尖细，壳面光滑或具饰纹。海生底栖，掘泥生活，仅壳的后半端露于海底泥沙之上。奥陶纪(?)，泥盆纪至现代。典型代表为角贝(Dentalium)。中国黔西上二叠统已有发现。
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Contributor
contributed at 2011-10-11
Classification(s)
●
Earth System(in Chinese) Paleontology
Detailed Description
| English |
|---|
| Name | Scaphopoda |
| Chinese |
|---|
| Name | 掘足纲 |
| Description | 软体动物门的一纲。体细长，两侧对称，头不发育，角贝无眼，腹面伸出一锥状足，作掘泥沙之用，故名掘足。体外被钙质锥状壳，壳微弯曲，两端开口，前口大，后端尖细，壳面光滑或具饰纹。海生底栖，掘泥生活，仅壳的后半端露于海底泥沙之上。奥陶纪(?)，泥盆纪至现代。典型代表为角贝(Dentalium)。中国黔西上二叠统已有发现。 |
How to Cite
NNU_Group (2011). 掘足纲, Concept & Semantic, OpenGMS,
https://geomodeling.njnu.edu.cn/repository/concept/76de3eb3-cd02-49d4-b102-16eb7b936482
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