Results 31 to 40 of about 1,576 (193)

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

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

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

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

Morphology of the temporal skull region in tetrapods: research history, functional explanations, and a new comprehensive classification scheme

Biological Reviews, Volume 96, Issue 5, Page 2229-2257, October 2021., 2021
ABSTRACT The morphology of the temporal region in the tetrapod skull traditionally has been a widely discussed feature of vertebrate anatomy. The evolution of different temporal openings in Amniota (mammals, birds, and reptiles), Lissamphibia (frogs, salamanders, and caecilians), and several extinct tetrapod groups has sparked debates on the ...
Pascal Abel, Ingmar Werneburg
wiley   +1 more source

Description and etiology of paleopathological lesions in the type specimen of Parasaurolophus walkeri (Dinosauria: Hadrosauridae), with proposed reconstructions of the nuchal ligament

Journal of Anatomy, Volume 238, Issue 5, Page 1055-1069, May 2021., 2021
The fossilized lesions in Parasaurolophus walkeri comprise periodontal disease, fractured ribs, and myositis ossificans traumatica in a number of vertebral dorsal spines and in the ilium. The injuries appear to have been caused by one or more non‐threatening events. The discoidal overgrowth on the dorsal spines m ight represent a pathological correlate
Filippo Bertozzo, Fabio Manucci, Matthew Dempsey, Darren H. Tanke, David C. Evans, Alastair Ruffell, Eileen Murphy   +6 more
wiley   +1 more source

A new rhynchocephalian from the late jurassic of Germany with a dentition that is unique amongst tetrapods. [PDF]

, 2012
Rhynchocephalians, the sister group of squamates (lizards and snakes), are only represented by the single genus Sphenodon today. This taxon is often considered to represent a very conservative lineage.
A Günther, A Hallam, A López-Arbarello, AB Heckert, Adriana López-Arbarello, Alexander M. Heyng, Andreas Hecker, Andrew A. Farke, CY-J Ung, DA Didier, DC Kalthoff, DI Whiteside, DU Schmid, ED Cope, FH Pough, FT Fürsich, GC Gorniak, GH Dalrymple, H-D Sues, HS Harrison, J Müller, KSW Campbell, M Cocude-Michel, MEH Jones, MEH Jones, MEH Jones, MEH Jones, MJ Benton, NC Fraser, NC Fraser, NC Fraser, NC Fraser, O Rieppel, O Rieppel, Oliver W. M. Rauhut, PR Bell, RE Espinoza, S Apesteguía, S Apesteguía, S Meiri, SE Evans, SE Evans, SM Reilly, T Ørvig, T Ørvig, V Dupret, V-H Reynoso, VH Reynoso, VH Reynoso, VH Reynoso, Z-X Luo   +50 more
core   +2 more sources

Molecular anatomy of emerging Xenopus left-right organizer at successive developmental stages. [PDF]

Dev Dyn
Abstract Background Vertebrate left–right symmetry breaking is preceded by formation of left–right organizer. In Amphibian, this structure is formed by gastrocoel roof plate, which emerges from superficial suprablastoporal cells. GRP is subdivided into medial area, which generates leftward flow by rotating monocilia and lateral Nodal1 expressing areas,
Petri N, Vetrova A, Tsikolia N, Kremnyov S.   +3 more
europepmc   +2 more sources

Correction: A New Archosauriform (Reptilia: Diapsida) from the Manda Beds (Middle Triassic) of Southwestern Tanzania [PDF]

PLoS ONE, 2014
doaj   +4 more sources