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86 results for “Permian-Triassic”
Fig. 5 in Ostracods (Crustacea) associated with microbialites across the Permian-Triassic boundary in Dajiang (Guizhou Province, South China)
Fig. 5. Height/length diagram of Bairdia?huberti sp. nov.
Fig. 6 in Ostracods (Crustacea) associated with microbialites across the Permian-Triassic boundary in Dajiang (Guizhou Province, South China)
Fig. 6. Height/length diagram of Bairdia jeromei sp. nov.
Fig. 1 in Ostracods (Crustacea) associated with microbialites across the Permian-Triassic boundary in Dajiang (Guizhou Province, South China)
Fig. 1. Location of the Dajiang section in the southern Guizhou Province, South China.
Figure 16 in Aras Valley (northwest Iran): high-resolution stratigraphy of a continuous central Tethyan Permian-Triassic boundary section
Figure 16. Succession of ammonoid genera in the Aras Valley section.
Figure 14 in Aras Valley (northwest Iran): high-resolution stratigraphy of a continuous central Tethyan Permian-Triassic boundary section
Figure 14. Mass occurrence of ostracod specimens in sample AV171 (+1.71 m). Scale bar units = 1 mm.
Fig. 19 in Biodiversity evolution through the Permian-Triassic boundary event: Ostracods from the Bükk Mountains, Hungary
Fig. 19. Height/length diagram of Eumiraculum desmaresae Forel sp. nov.
Fig. 8 in Biodiversity evolution through the Permian-Triassic boundary event: Ostracods from the Bükk Mountains, Hungary
Fig. 8. Height/length diagram of Bairdia davehornei Forel sp. nov.
Fig. 5 in Biodiversity evolution through the Permian-Triassic boundary event: Ostracods from the Bükk Mountains, Hungary
Fig. 5. Height/length diagram of Langdaia bullabalvanyensis Crasquin sp. nov.
Fig. 3 in Biodiversity evolution through the Permian-Triassic boundary event: Ostracods from the Bükk Mountains, Hungary
Fig. 3. Height/length diagram of Reviya praecurukensis Forel sp. nov.
Fig. 14 in Biodiversity evolution through the Permian-Triassic boundary event: Ostracods from the Bükk Mountains, Hungary
Fig. 14. Height/length diagram of Cytherellina? magyarorszagensis Forel sp. nov.
Fig. 7 in Biodiversity evolution through the Permian-Triassic boundary event: Ostracods from the Bükk Mountains, Hungary
Fig. 7. Height/length diagram of Bairdia anisongae Forel sp. nov.
Fig. 11 in Biodiversity evolution through the Permian-Triassic boundary event: Ostracods from the Bükk Mountains, Hungary
Fig. 11. Height/length diagram of Liuzhinia venninae Forel sp. nov.
Fig. 17 in Biodiversity evolution through the Permian-Triassic boundary event: Ostracods from the Bükk Mountains, Hungary
Fig. 17. Height/length diagram of Callicythere? balvanyseptentrioensis Forel sp. nov.
Fig. 13 in Biodiversity evolution through the Permian-Triassic boundary event: Ostracods from the Bükk Mountains, Hungary
Fig. 13. Height/length diagram of Hungarella gerennavarensis Crasquin sp. nov.
Fig. 16 in Biodiversity evolution through the Permian-Triassic boundary event: Ostracods from the Bükk Mountains, Hungary
Fig. 16. Height/length diagram of Microcheilinella egerensis Forel sp. nov.
Size variations in foraminifers from the Early Permian to the Late Triassic: implications for the Guadalupian-Lopingian and the Permian-Triassic mass extinctions
<p>The final 10 Myr of the Paleozoic saw two of the biggest biologic crises in Earth history: the Middle Permian extinction (often termed the Guadalupian-Lopingian extinction, GLE) that was followed 7–8 Myr later by Earth's most catastrophic loss of diversity, the Permian-Triassic mass extinction (PTME). These crises are not only manifest as sharp decreases in biodiversity and - particularly for the PTME - total ecosystem collapse, but they also drove major changes in biological morphological characteristics such as the Lilliput effect. The evolution of test size among different clades of foraminifera during these two extinction events has been less studied. We analyzed a global database of foraminiferal test size (volume) including 20226 specimens in 464 genera, 98 families, and 9 suborders from 632 publications. Our analyses reveal significant reductions in foraminiferal mean test size across the Guadalupian-Lopingian boundary (GLB) and the Permian-Triassic boundary (PTB), from 8.89 to 7.60 log10 μm3 (lg μm3), and from 7.25 to 5.82 lg μm3, respectively. The decline in test size across the GLB is a function of preferential extinction of genera exhibiting gigantism such as fusulinoidean fusulinids. Other clades show little change in size across the GLB. In contrast, all Lopingian suborders in our analysis (Fusulinina, Lagenina, Miliolina, and Textulariina) experienced a significant decrease in test size across the PTB mainly due to size-biased extinction and within-lineage change. The PTME was clearly a major catastrophe that affected many groups simultaneously, and the GLE was more selective, perhaps hinting at a subtler, less extreme driver than the later PTME.</p>
Research Data for 'Oxic conditions in shallow marine settings during the Permian-Triassic Mass Extinction'
<p>Complete geochemical data set for Siusi/Seis including bulk major, minor and trace element data as well as TOC and mercury content.</p>
FIGURE 1 in A peculiar new genus of Scytinopteridae (Hemiptera, Cicadomorpha) from the Permian-Triassic boundary beds of Mongolia
FIGURE 1. Beloscyta edi gen. et sp. nov., A–F, Holotype tegmen, A–D, SEM (BSE), E, Photograph, A, D, E, Part (images flipped), B, C, Counterpart. A, E, Whole tegmen. B, Base. C, Surface sculpture. D, Apex. F, Venation. G, Paratype (photograph). Scale bars = 1 mm (A, E–G), 0.4 mm (B), 0.2 mm (C, D).
Chemical composition data of sedimentary rocks from the Permian-Triassic boundary and Cretaceous oceanic anoxic events
<p>Bulk chemical composition data of sedimentary rocks from the Permian-Triassic boundary and Cretaceous oceanic anoxic events. This is a supplementary dataset for “Geochemical variations in sedimentary records of oxygen-depleted marine environments in representative geological periods: New perspectives from a multivariate statistical technique” by Moei Yano et al.</p>
Body size and geographic distribution of foraminiferal specimens during the Frasnian-Famennian (Frasnian), Guadalupian-Lopingian (Capitanian), Permian-Triassic (Changhsingian), Triassic-Jurassic (Rhaetian), and Cretaceous-Paleogene (Maastrichtian) mass extinctions.
<p>This dataset is about body size and geographic distribution of foraminiferal specimens during the Frasnian-Famennian (Frasnian), Guadalupian-Lopingian (Capitanian), Permian-Triassic (Changhsingian), Triassic-Jurassic (Rhaetian), and Cretaceous-Paleogene (Maastrichtian) mass extinctions.</p> <p>Foraminiferal body size data collection</p> <p>First, we collected published papers with foraminiferal images from the Frasnian (382.7-372.2 Ma), Capitanian (264.28-259.51 Ma), Changhsingian (254.14-251.902 Ma), Rhaetian (208.5-201.3 Ma), and Maastrichtian (72.1-66.1 Ma). Second, we measured two primary axes of specimens, such as maximum length and height in a conical or cylindrical shell. For some specimens, where there is no way to measure the length of both axes, we calculate the length of the unknown axis based on the aspect ratio of the type species. Third, we used the test volume as a standard indicator of body size, taking into account the diversity of foraminiferal morphology. Finally, the test volumes were calculated on a logarithmic scale with base 10 due to large individual differences, and the specific calculation is shown in Feng et al. (2020).</p>
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International Brain Laboratory public data
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OpenNeuro
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