A review of the evolution, biostratigraphy, provincialism and diversity of Middle and early Late Triassic conodonts

2015 ◽  
Vol 2 (2) ◽  
pp. 235-263 ◽  
Author(s):  
Yanlong Chen ◽  
Leopold Krystyn ◽  
Michael J. Orchard ◽  
Xu-Long Lai ◽  
Sylvain Richoz
Keyword(s):  
Late Triassic ◽  
Early Late

Tanystropheuscf.T. longobardicusfrom the early Late Triassic of Guizhou Province, southwestern China

2010 ◽  
Vol 30 (4) ◽  
pp. 1082-1089 ◽  
Author(s):  
Olivier Rieppel ◽  
Da-Yong Jiang ◽  
Nicholas C. Fraser ◽  
Wei-Cheng Hao ◽  
Ryosuke Motani ◽  
...  
Keyword(s):  
Guizhou Province ◽  
Late Triassic ◽  
Southwestern China ◽  
Early Late

Reply to comments on: A review of the evolution, biostratigraphy, provincialism and diversity of Middle and early Late Triassic conodonts

2016 ◽  
Vol 2 (3) ◽  
pp. 457-461
Author(s):  
Yanlong Chen ◽  
Leopold Krystyn ◽  
Michael J. Orchard ◽  
Xulong Lai ◽  
Sylvain Richoz
Keyword(s):  
Late Triassic ◽  
Early Late

A new early Late Triassic non-mammaliaform eucynodont from Poland

2018 ◽  
Vol 32 (1) ◽  
pp. 80-92 ◽  
Author(s):  
Tomasz Sulej ◽  
Grzegorz Niedźwiedzki ◽  
Mateusz Tałanda ◽  
Dawid Dróżdż ◽  
Ewa Hara
Keyword(s):  
Late Triassic ◽  
Early Late

scholarly journals Northward dispersal of dinosaurs from Gondwana to Greenland at the mid-Norian (215–212 Ma, Late Triassic) dip in atmospheric pCO2

2021 ◽  
Vol 118 (8) ◽  
pp. e2020778118
Author(s):  
Dennis V. Kent ◽  
Lars B. Clemmensen
Keyword(s):  
Northern Hemisphere ◽  
Additional Data ◽  
Late Triassic ◽  
Southern Brazil ◽  
Northwestern Argentina ◽  
Terrestrial Vertebrates ◽  
Composite Section ◽  
Age Model ◽  
Main Barrier ◽  
Early Late

The earliest dinosaurs (theropods and sauropodomorphs) are found in fossiliferous early Late Triassic strata dated to about 230 million years ago (Ma), mainly in northwestern Argentina and southern Brazil in the Southern Hemisphere temperate belt of what was Gondwana in Pangea. Sauropodomorphs, which are not known for the entire Triassic in then tropical North America, eventually appear 15 million years later in the Northern Hemisphere temperate belt of Laurasia. The Pangea supercontinent was traversable in principle by terrestrial vertebrates, so the main barrier to be surmounted for dispersal between hemispheres was likely to be climatic; in particular, the intense aridity of tropical desert belts and unstable climate in the equatorial humid belt accompanying high atmospheric pCO2 that characterized the Late Triassic. We revisited the chronostratigraphy of the dinosaur-bearing Fleming Fjord Group of central East Greenland and, with additional data, produced a correlation of a detailed magnetostratigraphy from more than 325 m of composite section from two field areas to the age-calibrated astrochronostratigraphic polarity time scale. This age model places the earliest occurrence of sauropodomorphs (Plateosaurus) in their northernmost range to ∼214 Ma. The timing is within the 215 to 212 Ma (mid-Norian) window of a major, robust dip in atmospheric pCO2 of uncertain origin but which may have resulted in sufficiently lowered climate barriers that facilitated the initial major dispersal of the herbivorous sauropodomorphs to the temperate belt of the Northern Hemisphere. Indications are that carnivorous theropods may have had dispersals that were less subject to the same climate constraints.

scholarly journals The rise of the ruling reptiles and ecosystem recovery from the Permo-Triassic mass extinction

2018 ◽  
Vol 285 (1880) ◽  
pp. 20180361 ◽  
Author(s):  
Martín D. Ezcurra ◽  
Richard J. Butler
Keyword(s):  
Mass Extinction ◽  
Evolutionary Rates ◽  
Middle Permian ◽  
Late Triassic ◽  
Ecosystem Recovery ◽  
Terrestrial Vertebrates ◽  
Earth History ◽  
Biodiversity Change ◽  
Globally Distributed ◽  
Early Late

One of the key faunal transitions in Earth history occurred after the Permo-Triassic mass extinction ( ca 252.2 Ma), when the previously obscure archosauromorphs (which include crocodylians, dinosaurs and birds) become the dominant terrestrial vertebrates. Here, we place all known middle Permian–early Late Triassic archosauromorph species into an explicit phylogenetic context, and quantify biodiversity change through this interval. Our results indicate the following sequence of diversification: a morphologically conservative and globally distributed post-extinction ‘disaster fauna’; a major but cryptic and poorly sampled phylogenetic diversification with significantly elevated evolutionary rates; and a marked increase in species counts, abundance, and disparity contemporaneous with global ecosystem stabilization some 5 million years after the extinction. This multiphase event transformed global ecosystems, with far-reaching consequences for Mesozoic and modern faunas.

Sign in / Sign up

Export Citation Format

Share Document