刺壳虫(学名:Acidaspis)是生存于中奥陶纪达瑞威尔阶至晚志留纪罗德洛世的一属三叶虫,生活在开阔的大陆棚和礁石上。这类三叶虫具有宽阔的外骨骼,并有长的颊刺。头鞍沟形成鼓胀侧裂片的外廓。小眼睛长在头鞍后部。头甲上有细小的结核,头甲边缘有一圈小刺。胸部有九节窄小的胸节,肋部末梢有朝后延伸的管状棘刺。尾部也有一圈长刺。这些棘刺具有保护作用。[2]
物种[1]
- Acidaspis aviensis Bruton, 1968
- Acidaspis bispinosa McCoy, 1846
- Acidaspis brightii Murchison, 1839
- Acidaspis evoluta Törnquist, 1884
- Acidaspis laticapitata Warburg, 1925
- Acidaspis viruana Oepik, 1937
以下的物种现时已被置入其他属。
参考文献
外部链接
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