Archosauromorph Triassic ecographic radiation and dispersals through Pangaean tropical dead zone (free pdf)
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Ben Creisler
Jun 11, 2025, 11:05:31 AMJun 11
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Ben Creisler
A new paper:
Joseph T. Flannery-Sutherland, Armin Elsler, Alexander Farnsworth, Daniel J. Lunt & Michael J. Benton (2025)
Landscape-explicit phylogeography illuminates the ecographic radiation of early archosauromorph reptiles
Nature Ecology & Evolution (advance online publication)
doi: https://doi.org/10.1038/s41559-025-02739-y
https://www.nature.com/articles/s41559-025-02739-y
Spatial incompleteness in the fossil record severely diminishes the observed ecological and geographic ranges of clades. The biological processes shaping species distributions and richness through time, however, also operate across geographic space and so clade biogeographic histories can indicate where their lineages must have successfully dispersed through these sampling gaps. Consequently, these histories are powerful, yet untapped tools for quantifying their unobserved ecographic diversity. Here, we couple phylogeographic modelling with a landscape connectivity approach to reconstruct the origins and dispersal of Permian–Triassic archosauromorph reptiles. We recover substantial ecographic diversity from the gaps in their fossil record, illuminating the cryptic first 20 million years of their evolutionary history, a peak in climatic disparity in the earliest Triassic period, and dispersals through the Pangaean tropical dead zone which contradict its perception as a hard barrier to vertebrate movement. This remarkable tolerance of climatic adversity was probably integral to their later evolutionary success.
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Free pdf:
Joseph T. Flannery-Sutherland, Armin Elsler, Alexander Farnsworth, Daniel J. Lunt & Michael J. Benton (2025)
Landscape-explicit phylogeography illuminates the ecographic radiation of early archosauromorph reptiles
Nature Ecology & Evolution (advance online publication)
doi: https://doi.org/10.1038/s41559-025-02739-y
https://www.nature.com/articles/s41559-025-02739-y
Spatial incompleteness in the fossil record severely diminishes the observed ecological and geographic ranges of clades. The biological processes shaping species distributions and richness through time, however, also operate across geographic space and so clade biogeographic histories can indicate where their lineages must have successfully dispersed through these sampling gaps. Consequently, these histories are powerful, yet untapped tools for quantifying their unobserved ecographic diversity. Here, we couple phylogeographic modelling with a landscape connectivity approach to reconstruct the origins and dispersal of Permian–Triassic archosauromorph reptiles. We recover substantial ecographic diversity from the gaps in their fossil record, illuminating the cryptic first 20 million years of their evolutionary history, a peak in climatic disparity in the earliest Triassic period, and dispersals through the Pangaean tropical dead zone which contradict its perception as a hard barrier to vertebrate movement. This remarkable tolerance of climatic adversity was probably integral to their later evolutionary success.
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News:
Triassic reptiles took 10,000 mile trips through “hellish” conditions, study suggests
First study to consider how ancient reptiles dispersed across the Earth after end-Permian mass extinction
First study to consider how ancient reptiles dispersed across the Earth after end-Permian mass extinction
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