Proliferation of MISS-related microbial mats following the end-Permian mass extinction in terrestrial ecosystems: Evidence from the Lower Triassic of the Yiyang area, Henan Province, North China

2016 ◽  
Vol 333 ◽  
pp. 50-69 ◽  
Author(s):  
Chenyi Tu ◽  
Zhong-Qiang Chen ◽  
Gregory J. Retallack ◽  
Yuangeng Huang ◽  
Yuheng Fang
Keyword(s):  
Mass Extinction ◽  
North China ◽  
Microbial Mats ◽  
Terrestrial Ecosystems ◽  
Lower Triassic ◽  
Henan Province ◽  
Permian Mass Extinction

scholarly journals Microbial mats in the terrestrial Lower Triassic of North China and implications for the Permian–Triassic mass extinction

2017 ◽  
Vol 474 ◽  
pp. 214-231 ◽  
Author(s):  
Daoliang Chu ◽  
Jinnan Tong ◽  
David J. Bottjer ◽  
Haijun Song ◽  
Huyue Song ◽  
...  
Keyword(s):  
Mass Extinction ◽  
North China ◽  
Microbial Mats ◽  
Lower Triassic

A new faunistic component of the Lower Triassic Panchet Formation of India increases the continental non-archosauromorph neodiapsid record in the aftermath of the end-Permian mass extinction

2021 ◽  
pp. 1-11
Author(s):  
Martín D. Ezcurra ◽  
Saswati Bandyopadhyay ◽  
Kasturi Sen
Keyword(s):  
Mass Extinction ◽  
Lower Triassic ◽  
Maximum Height ◽  
Dorsal Margin ◽  
Early Triassic ◽  
Anterior Portion ◽  
Continental Deposits ◽  
Biotic Recovery ◽  
Patterns And Processes ◽  
Permian Mass Extinction

Abstract The fossil record of Early Triassic diapsids is very important to understand how the end-Permian mass extinction affected ecosystems and the patterns and processes involved in the subsequent biotic recovery. Vertebrate fossil assemblages of continental deposits in current-day South Africa, China, and Russia are the best source of information of this clade during the aftermath of the extinction event. Although considerably less sampled, the Induan continental rocks of the Panchet Formation of the Damodar Basin (eastern India) have also yielded a relatively diverse vertebrate assemblage composed of fishes, temnospondyls, synapsids, and a single proterosuchid taxon. Here, we report on a small isolated diapsid partial ilium (ISIR 1132) from the upper Panchet Formation. This specimen has a distinct morphology compared to other tetrapods that we know, including a shallow emargination on the dorsal margin of the anterior portion of the iliac blade, and ratio between height of iliac blade versus maximum height of iliac acetabulum at level of the dorsalmost extension of supraacetabular crest ≤0.45. Comparisons and a quantitative phylogenetic analysis found ISIR 1132 as a non-archosauromorph neodiapsid. This new specimen expands the reptile diversity in the Panchet Formation as well as for the rest of Gondwana, where Early Triassic non-archosauromorph neodiapsid species are extremely scarce.

scholarly journals Archosauriform footprints in the Lower Triassic of Western Alps and their role in understanding the effects of the Permian-Triassic hyperthermal

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e10522
Author(s):  
Fabio Massimo Petti ◽  
Heinz Furrer ◽  
Enrico Collo ◽  
Edoardo Martinetto ◽  
Massimo Bernardi ◽  
...  
Keyword(s):  
Mass Extinction ◽  
Lower Triassic ◽  
Western Alps ◽  
Large Igneous Province ◽  
Early Triassic ◽  
Triassic Boundary ◽  
Habitable Zones ◽  
Single Well ◽  
Permian Mass Extinction ◽  
Permian Triassic Boundary

The most accepted killing model for the Permian-Triassic mass extinction (PTME) postulates that massive volcanic eruption (i.e., the Siberian Traps Large Igneous Province) led to geologically rapid global warming, acid rain and ocean anoxia. On land, habitable zones were drastically reduced, due to the combined effects of heating, drought and acid rains. This hyperthermal had severe effects also on the paleobiogeography of several groups of organisms. Among those, the tetrapods, whose geographical distribution across the end-Permian mass extinction (EPME) was the subject of controversy in a number of recent papers. We here describe and interpret a new Early Triassic (?Olenekian) archosauriform track assemblage from the Gardetta Plateau (Briançonnais, Western Alps, Italy) which, at the Permian-Triassic boundary, was placed at about 11° North. The tracks, both arranged in trackways and documented by single, well-preserved imprints, are assigned to Isochirotherium gardettensis ichnosp. nov., and are here interpreted as produced by a non-archosaurian archosauriform (erytrosuchid?) trackmaker. This new discovery provides further evidence for the presence of archosauriformes at low latitudes during the Early Triassic epoch, supporting a model in which the PTME did not completely vacate low-latitude lands from tetrapods that therefore would have been able to cope with the extreme hot temperatures of Pangaea mainland.

scholarly journals Decoupling of morphological disparity and taxonomic diversity during the end-Permian mass extinction

Paleobiology ◽  
2021 ◽  
pp. 1-16
Author(s):  
Junyu Wan ◽  
William J. Foster ◽  
Li Tian ◽  
Thomas L. Stubbs ◽  
Michael J. Benton ◽  
...  
Keyword(s):  
Mass Extinction ◽  
Microbial Mats ◽  
Benthic Communities ◽  
Ecological Impact ◽  
Taxonomic Diversity ◽  
Morphological Disparity ◽  
Extinction Event ◽  
Permian Extinction ◽  
Permian Mass Extinction ◽  
Marine Platform

Abstract An increasing number of unexpectedly diverse benthic communities are being reported from microbially precipitated carbonate facies in shallow-marine platform settings after the end-Permian mass extinction. Ostracoda, which was one of the most diverse and abundant metazoan groups during this interval, recorded its greatest diversity and abundance associated with these facies. Previous studies, however, focused mainly on taxonomic diversity and, therefore, left room for discussion of paleoecological significance. Here, we apply a morphometric method (semilandmarks) to investigate morphological variance through time to better understand the ecological consequences of the end-Permian mass extinction and to examine the hypothesis that microbial mats played a key role in ostracod survival. Our results show that taxonomic diversity and morphological disparity were decoupled during the end-Permian extinction and that morphological disparity declined rapidly at the onset of the end-Permian extinction, even though the high diversity of ostracods initially survived in some places. The decoupled changes in taxonomic diversity and morphological disparity suggest that the latter is a more robust proxy for understanding the ecological impact of the extinction event, and the low morphological disparity of ostracod faunas is a consequence of sustained environmental stress or a delayed post-Permian radiation. Furthermore, the similar morphological disparity of ostracods between microbialite and non-microbialite facies indicates that microbial mats most likely represent a taphonomic window rather than a biological refuge during the end-Permian extinction interval.

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