Results 31 to 40 of about 665 (187)

El registro fósil de plesiosaurios (Diapsida, Sauropterygia) en el Perú

Revista Peruana de Biología, 2021
Se realiza un recuento de los registros de plesiosaurios de Perú y se describe material referido a plesiosauria depositado en el Museo de Historia Natural de la UNMSM.El registro de plesiosaurios de Perú se extiende entre el Valanginiano-Hauteriviano ...
Ivan Meza-Velez, José O'Gorman
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

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

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

Early archosauromorph remains from the Permo-Triassic Buena Vista Formation of north-eastern Uruguay [PDF]

PeerJ, 2015
The Permo-Triassic archosauromorph record is crucial to understand the impact of the Permo-Triassic mass extinction on the early evolution of the group and its subsequent dominance in Mesozoic terrestrial ecosystems.
Martín D. Ezcurra, Pablo Velozo, Melitta Meneghel, Graciela Piñeiro   +3 more
doaj   +2 more sources

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

A new occurrence of the Late Triassic archosaur Smok in southern Poland [PDF]

Acta Palaeontologica Polonica, 2018
Two isolated teeth, a dorsal vertebra, fragments of a humerus and femur, a fragmentary pubic “boot” and part of an ischium shaft, identified here as belonging to a large predatory archosaur were discovered in the Upper Triassic site at Marciszów near ...
Grzegorz Niedźwiedzki, Ewa Budziszewska-Karwowska   +1 more
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

Whole‐body endothermy: ancient, homologous and widespread among the ancestors of mammals, birds and crocodylians

Biological Reviews, Volume 97, Issue 2, Page 766-801, April 2022., 2022
ABSTRACT The whole‐body (tachymetabolic) endothermy seen in modern birds and mammals is long held to have evolved independently in each group, a reasonable assumption when it was believed that its earliest appearances in birds and mammals arose many millions of years apart.
Gordon Grigg, Julia Nowack, José Eduardo Pereira Wilken Bicudo, Naresh Chandra Bal, Holly N. Woodward, Roger S. Seymour   +5 more
wiley   +1 more source