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Fossil and phylogenetic analyses reveal recurrent periods of diversification and extinction in dictyopteran insects
Cladistics ( IF 3.6 ) Pub Date : 2020-03-13 , DOI: 10.1111/cla.12412
Fabien L Condamine 1 , André Nel 2 , Philippe Grandcolas 2 , Frédéric Legendre 2
Affiliation  

Variations of speciation and extinction rates determine the fate of clades through time. Periods of high diversification and extinction (possibly mass‐extinction events) can punctuate the evolutionary history of various clades, but they remain loosely defined for many biological groups, especially nonmarine invertebrates like insects. Here, we examine whether the cockroaches, mantises and termites (altogether included in Dictyoptera) have experienced episodic pulses of speciation or extinction and how these pulses may be associated with environmental fluctuations or mass extinctions. We relied on molecular phylogeny and fossil data to shed light on the times and rates at which dictyopterans diversified. The diversification of Dictyoptera has alternated between (i) periods of high diversification in the late Carboniferous, Early–Middle Triassic, Early Cretaceous and middle Palaeogene, and (ii) periods of high extinction rates particularly at the Permian‐Triassic boundary, but not necessarily correlated with the major global biodiversity crises as in the mid‐Cretaceous. This study advocates the importance of analyzing, when possible, both molecular phylogeny and fossil data to unveil diversification and extinction periods for a given group. The causes and consequences of extinction must be studied beyond mass‐extinction events alone to gain a broader understanding of how clades wax and wane.

中文翻译:

化石和系统发育分析揭示了双翅目昆虫多样化和灭绝的反复时期

物种形成和灭绝率的变化决定了进化枝随时间的命运。高度多样化和灭绝的时期(可能是大规模灭绝事件)可以突显各种进化枝的进化史,但对于许多生物群体,尤其是昆虫等非海洋无脊椎动物来说,它们的定义仍然很松散。在这里,我们研究了蟑螂、螳螂和白蚁(包括在网翅目中)是否经历过物种形成或灭绝的间歇性脉冲,以及这些脉冲如何与环境波动或大规模灭绝相关联。我们依靠分子系统发育和化石数据来阐明双翅目昆虫多样化的时间和速度。Dictyoptera 的多样化在 (i) 晚石炭世、早中三叠世、早白垩世和中古近纪,以及(ii)高灭绝率时期,特别是在二叠纪-三叠纪边界,但与白垩纪中期的主要全球生物多样性危机不一定相关。这项研究提倡在可能的情况下分析分子系统发育和化石数据以揭示特定群体的多样化和灭绝时期的重要性。必须研究灭绝的原因和后果,而不仅仅是大规模灭绝事件,以更广泛地了解进化枝如何消长。分子系统发育和化石数据揭示特定群体的多样化和灭绝时期。必须研究灭绝的原因和后果,而不仅仅是大规模灭绝事件,以更广泛地了解进化枝如何消长。分子系统发育和化石数据揭示特定群体的多样化和灭绝时期。必须研究灭绝的原因和后果,而不仅仅是大规模灭绝事件,以更广泛地了解进化枝如何消长。
更新日期:2020-03-13
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