Comptes Rendus Palevol, Journal Year: 2024, Volume and Issue: 23(14)
Published: April 3, 2024
Language: Английский
Frontiers in Earth Science, Journal Year: 2022, Volume and Issue: 10
Published: June 17, 2022
The Triassic has long been recognized as a time during which marine and terrestrial ecosystems modernized dramatically, it seems to have two-step process. First, recovery from the Permian-Triassic mass extinction (PTME) was of extraordinary renewal novelty, these processes change were enhanced, seems, by effects Carnian Pluvial Episode (CPE). After CPE, in oceans, not only did carbonate factory begin towards its modern form, but also arguably Mesozoic Marine Revolution (MMR) speeded up. When MMR proposed seen process that occurred Late Jurassic Cretaceous, crustaceans, gastropods, fishes enhanced predator-prey arms races. New evidence China elsewhere suggests fact already underway Middle Triassic, so coincident with Sepkoski’s classic idea Paleozoic faunas replaced Modern beginning Triassic. On land, ongoing competition between synapsids archosauromorphs through marked posture shift sprawling erect, physiology warm-bloodedness, insulating skin coverings hair feathers. Dinosaurs, for example, originated Early or diversify until after CPE. These races, sea, endothermy tetrapods, triggered PTME, then
Language: Английский
Citations
36
Developmental Biology, Journal Year: 2024, Volume and Issue: 508, P. 64 - 76
Published: Jan. 6, 2024
Language: Английский
Citations
6
Current Biology, Journal Year: 2023, Volume and Issue: 33(4), P. 770 - 779.e4
Published: Feb. 1, 2023
Language: Английский
Citations
13
Royal Society Open Science, Journal Year: 2024, Volume and Issue: 11(2)
Published: Feb. 1, 2024
The Triassic was a time of ecological upheaval as life recovered from the Permian-Triassic mass extinction. Archosauromorphs were key component recovery, diversifying substantially during and encompassing origins dinosaurs, pterosaurs crocodylomorphs. Here, we explore evolution locomotion in Archosauromorpha to test whether dinosaurs show any distinctive locomotory features that might explain their success. We implement geometric morphometrics on limb bone shapes use ratios calculate bipedality cursoriality metrics. find Avemetatarsalia (dinosaurs, relatives) exhibit more variable form than other group, indicating wider range modes. earliest avemetatarsalians bipedal cursorial, increased through with notable diversification shifts following extinction events. This is especially true even though these changes cannot be discriminated stochastic process. By contrast, Pseudosuchia (crocodilians restricted locomotor mode disparity decreasing time, suggesting limited adaptation vulnerability Perhaps greater plasticity gave them competitive advantage changing climates Late Triassic.
Language: Английский
Citations
4
Biology Letters, Journal Year: 2025, Volume and Issue: 21(2)
Published: Feb. 1, 2025
As a defining feature of the clade, feathers are key to understanding bird biology. Discoveries spectacular dinosaur and pterosaur fossils preserving feather-like integumentary appendages demonstrate trends increasing complexity in gross morphology microstructure through avemetatarsalian evolution, acquisition complex flight before origin birds. Moreover, this material shows some early differed from modern morphologically, ultrastructurally, biochemically developmentally, revealing evolutionary pathways absent taxa. These advances have changed conventional dinosaurs impacted conceptions both birds feathers. However, it remains unknown if ‘true’ originated at base Avemetatarsalia or within Theropoda. The former scenario implies multiple feather losses, developmental mechanisms which require investigation; latter suggests pterosaurs ornithischians independently evolved filamentous appendages, might shared genetic regulatory networks with theropod Answering these questions requires additional data on integument, particularly for sauropodomorphs, diverging theropods outgroups, more information those taxa known features. An integrative approach combining morphological, developmental, biochemical taphonomic data, including extinct extant taxa, is essential clearer evolution.
Language: Английский
Citations
0
Published: Feb. 21, 2025
A combination of sectioning and microscopy techniques, along with the application finite-difference-time-domain modeling on a fossil feather, novelly results in estimation range iridescent colors from fossilized melanosomes preserved elongate head crest feathers new Cretaceous enantiornithine bird. The densely packed rod-like yield are estimated to have yielded red deep blue coloration feathers. shape density these melanosome may also further increased feather’s structural strength. This occurrence likely male individual is highly suggestive both signaling function crest, potential behavioral role adjusting angle light incidence control display this coloration.
Language: Английский
Citations
0
Published: Feb. 21, 2025
A combination of sectioning and microscopy techniques, along with the application finite-difference-time-domain modeling on a fossil feather, novelly results in estimation range iridescent colors from fossilized melanosomes preserved elongate head crest feathers new Cretaceous enantiornithine bird. The densely packed rod-like yield are estimated to have yielded red deep blue coloration feathers. shape density these melanosome may also further increased feather’s structural strength. This occurrence likely male individual is highly suggestive both signaling function crest, potential behavioral role adjusting angle light incidence control display this coloration.
Language: Английский
Citations
0
Science, Journal Year: 2025, Volume and Issue: 387(6739), P. 1193 - 1198
Published: March 13, 2025
Pelage coloration, which serves numerous functions, is crucial to the evolution of behavior, physiology, and habitat preferences mammals. However, little known about coloration Mesozoic mammaliaforms that coevolved with dinosaurs. In this study, we used a dataset melanosome (melanin-containing organelle) morphology quantitatively measured hair colors from 116 extant mammals reliably reconstruct six mammaliaforms, including previously undescribed euharamiyidan. Unlike highly diverse melanosomes discovered in feathered dinosaurs, hairs different lineages ecomorphotypes showed uniform geometry, corresponding dark-brown consistent crypsis nocturnality. Our results suggest variation color expansion seen may have occurred during their rapid radiation diversification after Cretaceous-Paleogene extinction.
Language: Английский
Citations
0
Cretaceous Research, Journal Year: 2025, Volume and Issue: unknown, P. 106161 - 106161
Published: May 1, 2025
Language: Английский
Citations
0
Geological Society London Special Publications, Journal Year: 2024, Volume and Issue: 544(1)
Published: Jan. 18, 2024
Abstract The explosive radiation of early birds has been well documented by the extraordinary discoveries Early Cretaceous fossil in China past three decades. They have greatly expanded diversity, disparity and temporal distribution Mesozoic birds, refining our knowledge evolutionary path leading to characteristic avian body plan, including feathers powered flight, locomotion habitat differentiation, diet digestion, reproduction development, feather colours display. In addition, studies on geological background Jehol Biota that produced majority Chinese provided important clues understanding taphonomy as interaction between deep process biological evolution northeastern East Asia during Cretaceous. Future multidisciplinary are expected advance palaeogeography what impacted changes diversity China, roles played terrestrial ecosystem.
Language: Английский
Citations
3