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Phanerozoic survivors: Actinopterygian evolution through the Permo-Triassic and Triassic-Jurassic mass extinction events.
Evolution. 2018 02; 72(2):348-362.E

Abstract

Actinopterygians (ray-finned fishes) successfully passed through four of the big five mass extinction events of the Phanerozoic, but the effects of these crises on the group are poorly understood. Many researchers have assumed that the Permo-Triassic mass extinction (PTME) and end-Triassic extinction (ETE) had little impact on actinopterygians, despite devastating many other groups. Here, two morphometric techniques, geometric (body shape) and functional (jaw morphology), are used to assess the effects of these two extinction events on the group. The PTME elicits no significant shifts in functional disparity while body shape disparity increases. An expansion of body shape and functional disparity coincides with the neopterygian radiation and evolution of novel feeding adaptations in the Middle-Late Triassic. Through the ETE, small decreases are seen in shape and functional disparity, but are unlikely to represent major changes brought about by the extinction event. In the Early Jurassic, further expansions into novel areas of ecospace indicative of durophagy occur, potentially linked to losses in the ETE. As no evidence is found for major perturbations in actinopterygian evolution through either extinction event, the group appears to have been immune to two major environmental crises that were disastrous to most other organisms.

Authors+Show Affiliations

Department of Earth Sciences, University of Bristol, Bristol BS8 1TQ, United Kingdom.Department of Earth Sciences, University of Bristol, Bristol BS8 1TQ, United Kingdom.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

29315531

Citation

Smithwick, Fiann M., and Thomas L. Stubbs. "Phanerozoic Survivors: Actinopterygian Evolution Through the Permo-Triassic and Triassic-Jurassic Mass Extinction Events." Evolution; International Journal of Organic Evolution, vol. 72, no. 2, 2018, pp. 348-362.
Smithwick FM, Stubbs TL. Phanerozoic survivors: Actinopterygian evolution through the Permo-Triassic and Triassic-Jurassic mass extinction events. Evolution. 2018;72(2):348-362.
Smithwick, F. M., & Stubbs, T. L. (2018). Phanerozoic survivors: Actinopterygian evolution through the Permo-Triassic and Triassic-Jurassic mass extinction events. Evolution; International Journal of Organic Evolution, 72(2), 348-362. https://doi.org/10.1111/evo.13421
Smithwick FM, Stubbs TL. Phanerozoic Survivors: Actinopterygian Evolution Through the Permo-Triassic and Triassic-Jurassic Mass Extinction Events. Evolution. 2018;72(2):348-362. PubMed PMID: 29315531.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Phanerozoic survivors: Actinopterygian evolution through the Permo-Triassic and Triassic-Jurassic mass extinction events. AU - Smithwick,Fiann M, AU - Stubbs,Thomas L, PY - 2016/11/29/received PY - 2017/12/19/revised PY - 2017/12/19/accepted PY - 2018/1/10/pubmed PY - 2019/3/16/medline PY - 2018/1/10/entrez KW - Actinopterygii KW - Permo-Triassic KW - end-Triassic extinction KW - macroevolution KW - mass extinctions KW - morphometrics SP - 348 EP - 362 JF - Evolution; international journal of organic evolution JO - Evolution VL - 72 IS - 2 N2 - Actinopterygians (ray-finned fishes) successfully passed through four of the big five mass extinction events of the Phanerozoic, but the effects of these crises on the group are poorly understood. Many researchers have assumed that the Permo-Triassic mass extinction (PTME) and end-Triassic extinction (ETE) had little impact on actinopterygians, despite devastating many other groups. Here, two morphometric techniques, geometric (body shape) and functional (jaw morphology), are used to assess the effects of these two extinction events on the group. The PTME elicits no significant shifts in functional disparity while body shape disparity increases. An expansion of body shape and functional disparity coincides with the neopterygian radiation and evolution of novel feeding adaptations in the Middle-Late Triassic. Through the ETE, small decreases are seen in shape and functional disparity, but are unlikely to represent major changes brought about by the extinction event. In the Early Jurassic, further expansions into novel areas of ecospace indicative of durophagy occur, potentially linked to losses in the ETE. As no evidence is found for major perturbations in actinopterygian evolution through either extinction event, the group appears to have been immune to two major environmental crises that were disastrous to most other organisms. SN - 1558-5646 UR - https://www.unboundmedicine.com/medline/citation/29315531/Phanerozoic_survivors:_Actinopterygian_evolution_through_the_Permo_Triassic_and_Triassic_Jurassic_mass_extinction_events_ L2 - https://doi.org/10.1111/evo.13421 DB - PRIME DP - Unbound Medicine ER -