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The rise of the ruling reptiles and ecosystem recovery from the Permo-Triassic mass extinction.

ABSTRACT: One of the key faunal transitions in Earth history occurred after the Permo-Triassic mass extinction (ca 252.2 Ma), when the previously obscure archosauromorphs (which include crocodylians, dinosaurs and birds) become the dominant terrestrial vertebrates. Here, we place all known middle Permian-early Late Triassic archosauromorph species into an explicit phylogenetic context, and quantify biodiversity change through this interval. Our results indicate the following sequence of diversification: a morphologically conservative and globally distributed post-extinction 'disaster fauna'; a major but cryptic and poorly sampled phylogenetic diversification with significantly elevated evolutionary rates; and a marked increase in species counts, abundance, and disparity contemporaneous with global ecosystem stabilization some 5 million years after the extinction. This multiphase event transformed global ecosystems, with far-reaching consequences for Mesozoic and modern faunas.

SUBMITTER: Ezcurra MD

PROVIDER: S-EPMC6015845 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature

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The rise of the ruling reptiles and ecosystem recovery from the Permo-Triassic mass extinction.

Ezcurra Martín D MD Butler Richard J RJ

Proceedings. Biological sciences 20180601 1880

One of the key faunal transitions in Earth history occurred after the Permo-Triassic mass extinction (<i>ca</i> 252.2 Ma), when the previously obscure archosauromorphs (which include crocodylians, dinosaurs and birds) become the dominant terrestrial vertebrates. Here, we place all known middle Permian-early Late Triassic archosauromorph species into an explicit phylogenetic context, and quantify biodiversity change through this interval. Our results indicate the following sequence of diversifica ...[more]

PMID: 29899066

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