Species diversity patterns are governed by complex interactions among biotic and abiotic factors over time and space, but are essentially the result of the diversification dynamics (differential speciation and extinction rates) over the long‐term evolutionary history of a clade. Previous studies have suggested that temporal variation in global temperature drove long‐term diversity changes in Crocodylia, a monophyletic group of large ectothermic organisms. We use a large database of crocodylian fossil occurrences (192 spp.) and body mass estimations, under a taxic approach, to characterize the global diversification dynamics of crocodylians since the Cretaceous, and their correlation with multiple biotic and abiotic factors in a Bayesian framework. The diversification dynamic of crocodylians, which appears to have originated in the Turonian (c. 92.5 Ma), is characterized by several phases with high extinction and speciation rates within a predominantly low long‐term mean rate. Our results reveal long‐term diversification dynamics of Crocodylia to be a highly complex process driven by a combination of biotic and abiotic factors which influenced the speciation and extinction rates in dissimilar ways. Higher crocodylian extinction rates are related to low body mass disparity, indicating selective extinctions of taxa at both ends of the body mass spectrum. Speciation rate slowdowns are noted when the diversity of the clade is high and the warm temperate climatic belt is reduced. Our finding supports the idea that temporal variations of body mass disparity, self‐diversity, and the warm climate belt size provided more direct mechanistic explanations for crocodylian diversification than do proxies of global temperature.

中文翻译：

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生物和非生物因素驱动蓝藻的多样化动态

物种多样性模式受生物和非生物因素在时间和空间上的复杂相互作用的支配，但本质上是进化枝长期进化史上多样化动态（差异物种形成和灭绝速率）的结果。先前的研究表明，全球温度的时间变化驱动了鳄梨属的长期多样性变化，鳄属是大型外热生物的单系群。我们使用大型方法对鳄鱼化石的发生（192 spp。）和体重估计进行了分类，以一种税收方法来描述白垩纪以来鳄鱼的全球多样化动态，以及它们与贝叶斯框架中多种生物和非生物因素的相关性。鳄鱼的多样性动态似乎起源于土伦（C。92.5 Ma）的特征是几个阶段的灭绝和物种形成率很高，而长期平均速率却很低。我们的研究结果表明，由生物和非生物因素共同驱动的鳄蓝的长期多样化动态是一个高度复杂的过程，这些因素以不同的方式影响物种和灭绝速度。较高的鳄鱼灭绝率与较低的体重差异有关，表明在体重谱两端两端的类群选择性灭绝。当进化枝的多样性很高并且温暖的温带气候带减少时，物种形成速率会降低。我们的发现支持以下观点：体重差异，自我多样性，