首页 > Term: cystidea
cystidea
An order of Crinoidea, mostly fossils of the Paleozoic rocks. They were usually roundish or egg-shaped, and often unsymmetrical; some were sessile, others had short stems.
- 词性: noun
- 行业/领域: 语言
- 类别 字典
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创建者
- spencer12
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(Germany)