Results 21 to 30 of about 303 (138)

Colobops: a juvenile rhynchocephalian reptile (Lepidosauromorpha), not a diminutive archosauromorph with an unusually strong bite [PDF]

Royal Society Open Science, 2020
Correctly identifying taxa at the root of major clades or the oldest clade-representatives is critical for meaningful interpretations of evolution. A small, partially crushed skull from the Late Triassic (Norian) of Connecticut, USA, originally described
Torsten M. Scheyer, Stephan N. F. Spiekman, Hans-Dieter Sues, Martín D. Ezcurra, Richard J. Butler, Marc E. H. Jones   +5 more
doaj   +1 more source

The pseudosuchian record in paleohistology: A small review. [PDF]

Anat Rec (Hoboken)
Abstract Archosauria originated around the Earth's largest biotic crisis that severely affected all ecosystems globally, the Permotriassic Mass extinction event, and comprises two crown‐group lineages: the bird‐lineage and the crocodylian lineage. The bird lineage includes the iconic pterosaurs, as well as dinosaurs and birds, whereas the crocodylian ...
Scheyer TM.
europepmc   +2 more sources

The enigmatic marine reptile nanchangosaurus from the lower triassic of Hubei, China and the phylogenetic affinities of Hupehsuchia. [PDF]

PLoS ONE, 2014
The study of the holotype and of a new specimen of Nanchangosaurus suni (Reptilia; Diapsida; Hupehsuchia) revealed a suite of hitherto unrecognized characters.
Xiao-hong Chen, Ryosuke Motani, Long Cheng, Da-yong Jiang, Olivier Rieppel   +4 more
doaj   +1 more source

The phylogenetic relationships of basal archosauromorphs, with an emphasis on the systematics of proterosuchian archosauriforms [PDF]

PeerJ, 2016
The early evolution of archosauromorphs during the Permo-Triassic constitutes an excellent empirical case study to shed light on evolutionary radiations in deep time and the timing and processes of recovery of terrestrial faunas after a mass extinction ...
Martín D. Ezcurra
doaj   +2 more sources

Almost billfish: convergent longirostry, micro-dentition, and possible glandular sinuses in a large teleost fish from the Upper Cretaceous of Northern Italy. [PDF]

J Anat
A fossil rostrum fragment of a large teleost fish from the Upper Cretaceous of Northern Italy reveals remarkable anatomical convergences with Cenozoic and Recent billfishes (marlins, swordfishes, and akin). The extinct group Plethodidae independently acquired a long snout, micro‐teeth, and oil‐gland sinuses well before the evolution of true billfishes.
Serafini G, Kriwet J, Toldo T, Fornaciari E, Amalfitano J, Carnevale G.   +5 more
europepmc   +2 more sources

Soft tissues influence nasal airflow in diapsids: Implications for dinosaurs

Journal of Morphology, Volume 284, Issue 9, September 2023., 2023
Bony‐bounded airway of the theropod, Majungasaurus, showing multiple regions of the nasal passage where comparative CFD studies can reliably infear soft‐tissue locations. Abstract The nasal passage performs multiple functions in amniotes, including olfaction and thermoregulation.
Jason M. Bourke, Lawrence M. Witmer
wiley   +1 more source

A description of the palate and mandible of Youngina capensis (Sauropsida, Diapsida) based on synchrotron tomography, and the phylogenetic implications

Papers in Palaeontology, Volume 9, Issue 5, September/October 2023., 2023
Abstract The late Permian reptile Youngina capensis (c. 254 Ma) is a non‐saurian neodiapsid whose anatomy has been used to represent the reptilian condition prior to the divergence of Sauria (crown‐group reptiles). However, despite being first described over 100 years ago, the anatomy of Youngina remains incompletely documented. Here we use synchrotron
Annabel K. Hunt, David P. Ford, Vincent Fernandez, Jonah N. Choiniere, Roger B. J. Benson   +4 more
wiley   +1 more source

Diversity of diapsid fifth metatarsals from the Lower Triassic karst deposits of Czatkowice, southern Poland—functional and phylogenetic implications [PDF]

Acta Palaeontologica Polonica, 2018
Three morphotypes of the fifth metatarsal (MttV), one of the most informative bones of the postcranium, have been described herein from the Early Triassic karst deposits of the Czatkowice locality (Southern Poland).
Magdalena Borsuk-Białynicka
doaj   +1 more source

Locomotor and postural diversity among reptiles viewed through the prism of femoral microanatomy: Palaeobiological implications for some Permian and Mesozoic taxa

Journal of Anatomy, Volume 242, Issue 5, Page 891-916, May 2023., 2023
Reptiles show great diversity of locomotion and posture. We employed phylogenetically informed statistical methods to explore their bone microanatomy. We used our models to infer the locomotion of extinct reptiles that document the different episodes of postural diversification in this clade.
Jordan Gônet, Jérémie Bardin, Marc Girondot, John R. Hutchinson, Michel Laurin   +4 more
wiley   +1 more source

The neural distribution of the avian homologue of oxytocin, mesotocin, in two songbird species, the zebra finch and the canary: A potential role in song perception and production

Journal of Comparative Neurology, Volume 530, Issue 13, Page 2402-2414, September 2022., 2022
Abstract The avian homologue of oxytocin (OT), formerly called mesotocin, influences social behaviors in songbirds and potentially song production. We sought to characterize the distribution of OT peptide in the brain of two songbird species: canaries (Serinus canaria) and zebra finches (Taeniopygia guttata).
Chelsea M. Haakenson, Jacques Balthazart, Farrah N. Madison, Gregory F. Ball   +3 more
wiley   +1 more source