Body size frequency distributions are often skewed to the right, with a greater frequency of small‐sized species. Right skewness can appear when speciation is biased towards small species and extinction towards large ones. In contrast, limits imposed by environmental constraints will select taxa to co‐occur in assemblages and can modify size distributions to the left or to the right. We analysed whether the shape of size distributions of anurans is related to diversification rates and how the environment might also be creating the observed patterns.

中文翻译：

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无脊椎动物的体型分布由多样化率和环境来解释

体型频率分布通常偏向右侧，小型物种的频率更高。当物种偏向小物种而绝种趋向大物种时，可能会出现右偏。相比之下，环境限制所施加的限制将选择在集合中同时出现的分类单元，并且可以修改左侧或右侧的大小分布。我们分析了无核动物的大小分布形状是否与多样化率有关，以及环境如何也可能创建观察到的模式。