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贫齿目
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贫齿目
Encyclopedia
理学
哺乳纲(化石)
释
贫齿目(化石)
曾是哺乳纲下的一个分类单元,包括管齿类、鳞甲类、异节类、纽齿类、冈瓦纳兽等。这些动物共有的一个演化趋势是牙齿丢失或简化,适应于取食蚂蚁或白蚁。研究认为,这一演化趋势在上述这些动物中是趋同演化的结果,这些动物之间并没有密切的亲缘关系,因此贫齿目这一分类单元已经很少有人使用。
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associated point
associated polynomial
associated power series
associated prime element
associated prime ideal
associated principal bundle
associated quadric
associated radius of convergence
associated reaction
Associated Research Centers for the Urban Underground Space
associated residue
associated ring
associated separated group
associated sequence
associated set
associated sheaf
associated space
associated Stirling number
associated structure
associated surface
associated system
associated tensor
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