The oldest Gondwanan record of the extinct durophagous hybodontiform chondrichthyan, Strophodus from the Bajocian of Morocco DOI Creative Commons
Sebastian Stumpf, Christoph Kettler,

René Kindlimann

et al.

Swiss Journal of Palaeontology, Journal Year: 2023, Volume and Issue: 142(1)

Published: April 25, 2023

Abstract Strophodus is a speciose and geographically widespread taxon of large durophagous hybodontiform chondrichthyan, with stratigraphic range extending from Middle Triassic to the Early Cretaceous. Here, we describe new species , S . atlasensis sp. nov., based on an incomplete articulated dentition recovered marine Bajocian deposits eastern High Atlas Mountains in Morocco. The diagnosed by unique combination dental characters that includes, among others, presence triangular first lateral teeth, mesio-distally wide bulbous second teeth without occlusal crest or dome uniquely shaped posterior are shorter than being labio-lingually long, as well small whose roots protrude below crowns meet each other efficient interlocking manner. holotype only specimen nov. represents hitherto oldest known record Gondwana genus Bajocian, thus adding valuable novel information our understanding evolutionary history extinct chondrichthyans.

Language: Английский

A Mesozoic fossil lagerstätte from 250.8 million years ago shows a modern-type marine ecosystem DOI
Xu Dai, Joshua H.F.L. Davies, Zhiwei Yuan

et al.

Science, Journal Year: 2023, Volume and Issue: 379(6632), P. 567 - 572

Published: Feb. 10, 2023

Finely preserved fossil assemblages (lagerstätten) provide crucial insights into evolutionary innovations in deep time. We report an exceptionally Early Triassic assemblage, the Guiyang Biota, from Daye Formation near Guiyang, South China. High-precision uranium-lead dating shows that age of Biota is 250.83 +0.07/–0.06 million years ago. This only 1.08 ± 0.08 after severe Permian-Triassic mass extinction, and this assemblage therefore represents oldest known Mesozoic lagerstätte found so far. The comprises at least 12 classes 19 orders, including diverse fish fauna malacostracans, revealing a trophically complex marine ecosystem. Therefore, demonstrates rapid rise modern-type ecosystems extinction.

Language: Английский

Citations

51
A complete skull of a stem mammal from the Late Triassic of Brazil illuminates the early evolution of prozostrodontian cynodonts DOI
Micheli Stefanello, Agustín G. Martinelli, Rodrigo Temp Müller

et al.

Journal of Mammalian Evolution, Journal Year: 2023, Volume and Issue: 30(2), P. 299 - 317

Published: Jan. 30, 2023

Language: Английский

Citations

15
Latest Triassic terrestrial microvertebrate assemblages from caves on the Mendip palaeoisland, S.W. England, at Emborough, Batscombe and Highcroft Quarries DOI Creative Commons

Michael Cawthorne,

David I. Whiteside, Michael J. Benton

et al.

Proceedings of the Geologists Association, Journal Year: 2024, Volume and Issue: 135(1), P. 105 - 130

Published: Jan. 21, 2024

Language: Английский

Citations

5
Impact of the Jenkyns Event (early Toarcian) on dinosaurs: Comparison with the Triassic/Jurassic transition DOI Creative Commons
Matías Reolid, Wolfgang Ruebsam, Michael J. Benton

et al.

Earth-Science Reviews, Journal Year: 2022, Volume and Issue: 234, P. 104196 - 104196

Published: Sept. 28, 2022

The Early Jurassic Jenkyns Event (∼183 Ma) was characterized in terrestrial environments by global warming, perturbation of the carbon cycle, enhanced weathering and wildfires. Heating acid rain on land caused a loss forests affected diversity composition plant assemblages rest trophic web. We suggest that Event, triggered activity Karoo-Ferrar Large Igneous Province, pivotal remodelling ecosystems, including plants dinosaurs. Macroplant palynological data show reductions richness conifers, cycadophytes, ginkgophytes, bennetitaleans, ferns, continuation seasonally dry warm conditions. Major changes occurred to sauropodomorph dinosaurs, with extinction diverse basal families formerly called ‘prosauropods’ as well some sauropods, diversification derived Eusauropoda Toarcian South America, Africa, Asia, wider new families, Mamenchisauridae, Cetiosauridae Neosauropoda (Dicraeosauridae Macronaria) Middle Jurassic, showing massive increase size feeding modes. Ornithischian dinosaurs patchy records; heterodontosaurids scelidosaurids disappeared, major clades (Stegosauridae, Ankylosauridae, Nodosauridae) emerged soon after Bajocian Bathonian worldwide. Among theropod Coelophysidae Dilophosauridae died out during theropods (Megalosauroidea, Allosauroidea, Tyrannosauroidea) this event substantial increases size. then crisis marked especially floral origins clades, increasing body Comparison end Triassic Mass Extinction helps understand incidence climatic driven large igneous provinces ecosystems their great impacts early dinosaur evolution.

Language: Английский

Citations

21
Bayesian analyses indicate bivalves did not drive the downfall of brachiopods following the Permian-Triassic mass extinction DOI Creative Commons
Zhen Guo, Joseph T. Flannery‐Sutherland, Michael J. Benton

et al.

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Sept. 9, 2023

Certain times of major biotic replacement have often been interpreted as broadly competitive, mediated by innovation in the succeeding clades. A classic example was switch from brachiopods to bivalves seabed organisms following Permian-Triassic mass extinction (PTME), ~252 million years ago. This attributed competitive exclusion better adapted or simply fact that had hit especially hard PTME. The brachiopod-bivalve is emblematic global turnover marine faunas Palaeozoic-type Modern-type triggered Here, using Bayesian analyses, we find unexpectedly two clades displayed similar large-scale trends diversification before Jurassic. Insight a multivariate birth-death model shows brachiopod during PTME set stage for switch, with differential responses high ocean temperatures post-extinction further facilitating their displacement bivalves. Our study strengthens evidence and were not competitors over macroevolutionary time scales, events environmental stresses shaping divergent fates.

Language: Английский

Citations

13
Top of the food chains: an ecological network of the marine Paja Formation biota from the Early Cretaceous of Colombia reveals the highest trophic levels ever estimated DOI
Dirley Cortés, Hans C. E. Larsson

Zoological Journal of the Linnean Society, Journal Year: 2023, Volume and Issue: 202(1)

Published: Sept. 16, 2023

Abstract The Mesozoic Marine Revolution restructured the world’s ocean biodiversity into complex marine ecosystems of today. This revolution began during Triassic but origin this complexity is poorly understood due to a lack detailed ecosystem reconstructions throughout time. We present first site-specific ecological network for fauna based on Early Cretaceous Paja Formation biota Colombia that preserves numerous, large-bodied, predatory reptiles. trophic food-web was quantitatively reconstructed inferred interactions producers, consumers, and large apex predators. Compared well-studied Caribbean reef networks, missing great proportion benthic invertebrates fishes, despite its rich higher levels. hypothesize ammonites from either mirrored diversity represented by some fishes today or established novel unit with no living analogue. Recalibrating analogues in Caribbean, such as sea turtles, estimates largest reptile hyper-apex predators occupied levels full tier than any extant predator. starting point tracing evolution across Revolution.

Language: Английский

Citations

10
Novel record of placodont remains including a Henodus cranium from the Upper Triassic Silves Group of the Algarve, southern Portugal DOI Creative Commons
Maciej Ruciński,

H. Campos,

Octávio Mateus

et al.

Journal of Vertebrate Paleontology, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Language: Английский

Citations

0
Back to the poop: the oldest hexapod scales discovered within a Triassic coprolite from Argentina DOI
Lucas E. Fiorelli, Ezequiel I. Vera, Valeria S. Pérez Loinaze

et al.

Journal of South American Earth Sciences, Journal Year: 2025, Volume and Issue: unknown, P. 105584 - 105584

Published: May 1, 2025

Language: Английский

Citations

0
Rapid turnover of top predators in African terrestrial faunas around the Permian-Triassic mass extinction DOI Creative Commons
Christian F. Kammerer, Pia A. Viglietti, Elize Butler

et al.

Current Biology, Journal Year: 2023, Volume and Issue: 33(11), P. 2283 - 2290.e3

Published: May 22, 2023

Language: Английский

Citations

9
The dawn of an Era: New contributions on comparative and functional anatomy of Triassic tetrapods DOI
Felipe L. Pinheiro, Flávio Augusto Pretto, Leonardo Kerber

et al.

The Anatomical Record, Journal Year: 2024, Volume and Issue: 307(4), P. 713 - 721

Published: Feb. 12, 2024

Abstract The Triassic period stands as a crucial moment for understanding tetrapod evolution, marking the emergence and early diversification of numerous lineages that persist in today's ecosystems. Birds, crocodiles, testudines, lizards, mammals can all trace their origins to Triassic, which is distinguished by several adaptive radiation events fostered unparalleled diversity body plans lifestyles. Beyond this macroevolutionary significance, serves fertile ground scientific inquiry, especially studies. aim Special Issue assemble diverse array new contributions focused on continental tetrapods globally, encouraging collaboration among researchers across generations, pooling efforts comprehend pivotal evolutionary history. This issue encompasses almost 40 varied contributions, spanning topics from comparative functional anatomy, including descriptions novel taxa, comprehensive anatomical reviews, systematic investigations, phylogenetic analyses, paleoneurological studies, biomechanical assessments, detailed examinations histology ontogeny. Collectively, offers an extensive exploration anatomical, ecological, perspectives, unveiling fresh insights into intriguing vertebrate

Language: Английский

Citations

3