The characteristics and affinities of the Amphisbaenia
The characteristics and affinities of the Amphisbaenia
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两栖类的特征和亲缘关系
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
C. Gans
中科院分区：
文献类型：
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作者：
C. Gans
从关于两栖类在脊椎动物中的适当位置的许多观点变化来看，两栖类似乎使大多数爬虫学的学生感到困惑。重新评估表明，现在可能有理由将两栖类分类为一个目，与蜥蜴和蛇分开，但与它们一起包括在有鳞目中。这一观点的证据可能来自几十个系统，在这些系统中，两栖类与蜥蜴、蛇或两者都不同。虽然个别的性格状态偶尔会与一个或另一个蜥蜴家族所表现出的状态相当，但没有“最接近”的家族。这表明，双肢蜥可能是在所有现存蜥蜴科分化之前从有鳞目的其余部分分化出来的。不幸的是，许多的字符状态仍然是已知的，只有有限数量的amphisbaenians和信息的其他分组的有鳞动物同样是不够的。
The amphisbaenians, to judge from the many changes of opinion regarding their appropriate position among the vertebrates, appear to have puzzled most students of herpetology. Re-evaluation suggests that a case may now be made for classifying the amphisbaenians as an order, separate from the lizards and snakes, but included with them in a superorder Squamata. Evidence for such a position may be derived from several dozen systems in which amphisbaenians differ from lizards, from snakes, or from both. Although individual character states are occasionally equivalent to those shown by one or another family of lizards, there is no “closest” family. This suggests that the Amphisbaenia probably diverged from the remainder of the Squamata before the diversification of all present families of lizards. Unfortunately many of the character states are still known from only a limited number of amphisbaenians and information for other groupings of squamates is similarly inadequate.