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Machaeridia

1、短剑类

【摘要】：正一、前言短剑类(Machaeridia)是一类两侧对称、区分前后的海生动物。虽然其分类位置至今尚未肯定,但大多数学者都倾向于认为是环节动物(Annelida)的一个分支(Je...

2、下一篇

...上一篇：小颚，下颚 maxilla下一篇：小刀类 Machaeridia锌指蛋白 Zinc finger protein ...

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