三叶形亚门(Trilobitomorpha)是包括三叶虫纲以及近亲的类群。
三叶形亚门 | |
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Koneprusia brutoni | |
科学分类 | |
界: | 动物界 Animalia |
门: | 节肢动物门 Arthropoda |
亚门: | †三叶形亚门 Trilobitomorpha |
演化支 | |
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具坚硬的几丁质的外壳。身体分头、胸(或头胸部)和腹部。附肢双肢型。内肢为步足,外肢为鳃肢。触角附着在口之前。
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