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两栖纲
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两栖纲
Encyclopedia
理学
两栖纲(化石)
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两栖纲(化石)
脊椎动物中最早登上陆地的一个门类,其他陆生脊椎动物由它发展而来。包括现生两栖类及其近亲(滑体两栖类)和古生代、中生代的非羊膜类四足动物(即“古代”两栖类)。
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