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Taxonomic and ecomorphological diversity of temnospondyl amphibians across the Permian-Triassic boundary in the Karoo Basin (South Africa).
J Morphol. 2018 12; 279(12):1840-1848.JM

Abstract

Temnospondyl amphibians experienced a geologically brief interval of success in the wake of the end-Permian mass extinction. This study examines the relationship between taxonomic and ecological diversity of temnospondyls across the Permian-Triassic boundary in the Karoo Basin of South Africa. Ecomorphological diversity, as implied by differences in cranial shape, was incorporated into the study by the use of a landmark-based geometric morphometric analysis. Both taxonomic diversity and cranial disparity are low during the Permian and increase across the Permian-Triassic boundary. Taxonomic diversity is stable through the Triassic, but disparity shows subsequent increases during the Olenekian and Anisian. Temnospondyls are restricted in size immediately following the extinction, but size range fully rebounds by the Olenekian. Cranial shape is heavily influenced by phylogenetic relatedness, and the observed increases in disparity may be partly the result of decreases in the net relatedness of coeval Karoo stereospondylomorph temnospondyls in younger faunas. The increase in community level taxonomic diversity for temnospondyls in the Karoo following the end-Permian mass extinction was likely facilitated by an influx of distantly related and ecologically distinct species.

Authors+Show Affiliations

Department of Earth & Environmental Sciences, University of Iowa, Iowa.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30397933

Citation

Tarailo, David A.. "Taxonomic and Ecomorphological Diversity of Temnospondyl Amphibians Across the Permian-Triassic Boundary in the Karoo Basin (South Africa)." Journal of Morphology, vol. 279, no. 12, 2018, pp. 1840-1848.
Tarailo DA. Taxonomic and ecomorphological diversity of temnospondyl amphibians across the Permian-Triassic boundary in the Karoo Basin (South Africa). J Morphol. 2018;279(12):1840-1848.
Tarailo, D. A. (2018). Taxonomic and ecomorphological diversity of temnospondyl amphibians across the Permian-Triassic boundary in the Karoo Basin (South Africa). Journal of Morphology, 279(12), 1840-1848. https://doi.org/10.1002/jmor.20906
Tarailo DA. Taxonomic and Ecomorphological Diversity of Temnospondyl Amphibians Across the Permian-Triassic Boundary in the Karoo Basin (South Africa). J Morphol. 2018;279(12):1840-1848. PubMed PMID: 30397933.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Taxonomic and ecomorphological diversity of temnospondyl amphibians across the Permian-Triassic boundary in the Karoo Basin (South Africa). A1 - Tarailo,David A, Y1 - 2018/11/05/ PY - 2018/02/06/received PY - 2018/09/19/revised PY - 2018/09/23/accepted PY - 2018/11/7/pubmed PY - 2019/10/2/medline PY - 2018/11/7/entrez KW - Stereospondyli KW - end-Permian mass extinction KW - geometric morphometrics KW - morphological disparity KW - recovery SP - 1840 EP - 1848 JF - Journal of morphology JO - J. Morphol. VL - 279 IS - 12 N2 - Temnospondyl amphibians experienced a geologically brief interval of success in the wake of the end-Permian mass extinction. This study examines the relationship between taxonomic and ecological diversity of temnospondyls across the Permian-Triassic boundary in the Karoo Basin of South Africa. Ecomorphological diversity, as implied by differences in cranial shape, was incorporated into the study by the use of a landmark-based geometric morphometric analysis. Both taxonomic diversity and cranial disparity are low during the Permian and increase across the Permian-Triassic boundary. Taxonomic diversity is stable through the Triassic, but disparity shows subsequent increases during the Olenekian and Anisian. Temnospondyls are restricted in size immediately following the extinction, but size range fully rebounds by the Olenekian. Cranial shape is heavily influenced by phylogenetic relatedness, and the observed increases in disparity may be partly the result of decreases in the net relatedness of coeval Karoo stereospondylomorph temnospondyls in younger faunas. The increase in community level taxonomic diversity for temnospondyls in the Karoo following the end-Permian mass extinction was likely facilitated by an influx of distantly related and ecologically distinct species. SN - 1097-4687 UR - https://www.unboundmedicine.com/medline/citation/30397933/Taxonomic_and_ecomorphological_diversity_of_temnospondyl_amphibians_across_the_Permian_Triassic_boundary_in_the_Karoo_Basin__South_Africa__ L2 - https://doi.org/10.1002/jmor.20906 DB - PRIME DP - Unbound Medicine ER -