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钙质海绵纲

钙质海绵纲
化石时期:寒武纪至现代
自然界的艺术形态》 (1904), 图版 5: Calcispongiae
科学分类 编辑
界: 动物界 Animalia
门: 多孔动物门 Porifera
纲: 钙质海绵纲 Calcarea
亚纲

钙质海绵纲多孔动物门的一个纲。多产于浅。种类很多。体型大多小于10cm。有单体的,例如:毛壶(Grantia);也有分枝成群体的,例如白枝海绵Leucosolenia)。质骨针(CaCO3)有针状体、三辐体等等。

在地层中的出现晚于寻常海绵纲六放海绵纲

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钙质海绵纲
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