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蜥脚型类
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sauropodomorph
蜥脚型类
与萨尔塔龙亲缘关系比兽脚类更近的所有蜥臀类恐龙。包括基干蜥脚型类和蜥脚类。学者们以前习惯将基干蜥脚型类统称为原蜥脚类(Prosauropoda),认为它是蜥脚类的姊妹群。现在认为基干蜥脚型类并不是单系类群,尽管其中某些属种可能构成了若干小的单系类群。
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loss cone angle
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