Results 21 to 30 of about 352 (132)

Femoral specializations to locomotor habits in early archosauriforms

Journal of Anatomy, Volume 240, Issue 5, Page 867-892, May 2022., 2022
We studied femoral shape variation by applying 3D geometric morphometrics to a large sample of archosauriforms predominantly from the Late Triassic. We identified a set of anatomical features varying with locomotor mode (quadrupedal/bipedal) or body size.
Romain Pintore, Alexandra Houssaye, Sterling J. Nesbitt, John R. Hutchinson   +3 more
wiley   +1 more source

A new paravian dinosaur from the Late Jurassic of North America supports a late acquisition of avian flight [PDF]

PeerJ, 2019
The last two decades have seen a remarkable increase in the known diversity of basal avialans and their paravian relatives. The lack of resolution in the relationships of these groups combined with attributing the behavior of specialized taxa to the base
Scott Hartman, Mickey Mortimer, William R. Wahl, Dean R. Lomax, Jessica Lippincott, David M. Lovelace   +5 more
doaj   +2 more sources

Relative skull size evolution in Mesozoic archosauromorphs: potential drivers and morphological uniqueness of erythrosuchid archosauriforms

Palaeontology, Volume 65, Issue 3, May/June 2022., 2022
Abstract Little is known about the large‐scale evolutionary patterns of skull size relative to body size, and the possible drivers behind these patterns, in Archosauromorpha. For example, the large skulls of erythrosuchids, a group of non‐archosaurian archosauromorphs from the Early and Middle Triassic, and of theropod dinosaurs are regarded as ...
Jordan Bestwick, Pedro L. Godoy, Susannah C. R. Maidment, Martín D. Ezcurra, Mia Wroe, Thomas J. Raven, Joseph A. Bonsor, Richard J. Butler, Kenneth Angielczyk   +8 more
wiley   +1 more source

Upper Cretaceous European theropod palaeobiodiversity, palaeobiogeography and the intra‐Maastrichtian faunal turnover: new contributions from the Iberian fossil site of Laño

Papers in Palaeontology, Volume 8, Issue 1, January/February 2022., 2022
Abstract A total of 227 theropod teeth have so far been recovered from the upper Campanian Laño site (northern Iberian Peninsula). The teeth were studied for their qualitative and quantitative features. From the theropod sample found at Laño, seven morphotypes attributed to five taxa are identified: a medium to large abelisaurid (Arcovenator sp.) and ...
Erik Isasmendi, Angelica Torices, José Ignacio Canudo, Philip J. Currie, Xabier Pereda‐Suberbiola, David Button   +5 more
wiley   +1 more source

The diet of early birds based on modern and fossil evidence and a new framework for its reconstruction

Biological Reviews, Volume 96, Issue 5, Page 2058-2112, October 2021., 2021
ABSTRACT Birds are some of the most diverse organisms on Earth, with species inhabiting a wide variety of niches across every major biome. As such, birds are vital to our understanding of modern ecosystems. Unfortunately, our understanding of the evolutionary history of modern ecosystems is hampered by knowledge gaps in the origin of modern bird ...
Case Vincent Miller, Michael Pittman
wiley   +1 more source

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

Was dinosaurian physiology inherited by birds? Reconciling slow growth in archaeopteryx. [PDF]

PLoS ONE, 2009
Archaeopteryx is the oldest and most primitive known bird (Avialae). It is believed that the growth and energetic physiology of basalmost birds such as Archaeopteryx were inherited in their entirety from non-avialan dinosaurs.
Gregory M Erickson, Oliver W M Rauhut, Zhonghe Zhou, Alan H Turner, Brian D Inouye, Dongyu Hu, Mark A Norell   +6 more
doaj   +1 more source

Cautionary tales on the use of proxies to estimate body size and form of extinct animals. [PDF]

Ecol Evol
Reconstructing the body size and form of extinct animals is of vital importance to our understanding of macroevolution and palaeontology. This is often done using anatomical proxies where extinct species are known only from fragmentary remains. However, there are many limitations influencing the selection of proxy taxa that are frequently overlooked ...
Gayford JH, Engelman RK, Sternes PC, Itano WM, Bazzi M, Collareta A, Salas-Gismondi R, Shimada K.   +7 more
europepmc   +2 more sources

Multiphase progenetic development shaped the brain of flying archosaurs. [PDF]

Sci Rep, 2019
The growing availability of virtual cranial endocasts of extinct and extant vertebrates has fueled the quest for endocranial characters that discriminate between phylogenetic groups and resolve their neural significances.
Beyrand V, Voeten DFAE, Bureš S, Fernandez V, Janáček J, Jirák D, Rauhut O, Tafforeau P.   +7 more
europepmc   +2 more sources

Metabolic features of enantiornithines (Avialae: Ornithothoraces): evidence supporting a semi-precocial/precocial developmental trajectoryMetabolic features of enantiornithines (Avialae: Ornithothoraces): evidence supporting a semi-precocial/precocial developmental trajectory [PDF]

Royal Society Open Science
The enantiornithes, a group of Mesozoic birds, have morphological features suggesting a precocial mode of development; however, their detailed physiological characteristics, particularly hatchling metabolic rates, have yet to be explored.
Mariana V. Haase, Fabien Knoll, Dennis Voeten, Sophie Sanchez, Zhiheng Li, Hugo Bert, Esaú V. de Araújo, Francisco J. Serrano, Javier C. Terol, Jesús Marugán-Lobón, Jorge Cubo   +10 more
doaj   +1 more source