Results 11 to 20 of about 436 (150)

Skeletal completeness of the non-avian theropod dinosaur fossil record [PDF]

Palaeontology, Volume 62, Issue 6, Page 951-981, November 2019., 2019
Non-avian theropods were a highly successful clade of bipedal, predominantly carnivorous, dinosaurs. Their diversity and macroevolutionary patterns have been the subject of many studies.
Benton M. J., Bertin T., Brocklehurst N., Carrano M. T., Case J. A., Cashmore D. D., Charig A. J., Ezcurra M. D., Gauthier J., Henderson D. M., Holtz T. R., Hone D. W. E., Juul L., Kobayashi Y., Leonardi G., Malkani M. S., Newell N. D., Olivero E., Rich T. H., Salgado L., Smith N. D.   +20 more
core   +2 more sources

Paravian Phylogeny and the Dinosaur-Bird Transition: An Overview [PDF]

Frontiers in Earth Science, 2019
Recent years witnessed the discovery of a great diversity of early birds as well as closely related non-avian theropods, which modified previous conceptions about the origin of birds and their flight. We here present a review of the taxonomic composition
Federico L. Agnolin, Federico L. Agnolin, Federico L. Agnolin, Matias J. Motta, Matias J. Motta, Federico Brissón Egli, Federico Brissón Egli, Gastón Lo Coco, Gastón Lo Coco, Fernando E. Novas, Fernando E. Novas   +10 more
doaj   +3 more sources

High rates of evolution preceded the origin of birds. [PDF]

Evolution, 2014
The origin of birds (Aves) is one of the great evolutionary transitions. Fossils show that many unique morphological features of modern birds, such as feathers, reduction in body size, and the semilunate carpal, long preceded the origin of clade Aves ...
Puttick MN, Thomas GH, Benton MJ.
europepmc   +3 more sources

The origin and evolution of air sacs in pterosaurs and their forerunners. [PDF]

J Anat
Pneumatized pterosauromorph vertebrae and their phylogenetic context. Abstract Although the existence of postcranial pneumaticity and the inferred presence of air sacs connected to the lungs are well established in Pterosauria, the origin of this system in pterosaurs remains unclear. We investigated skeletal pneumaticity in the Triassic pterosauromorph
Aureliano T, Müller RT, Holgado B, Kerber L, Ghilardi AM.   +4 more
europepmc   +2 more sources

Cancellous bone and theropod dinosaur locomotion. Part III-Inferring posture and locomotor biomechanics in extinct theropods, and its evolution on the line to birds. [PDF]

PeerJ, 2018
This paper is the last of a three-part series that investigates the architecture of cancellous bone in the main hindlimb bones of theropod dinosaurs, and uses cancellous bone architectural patterns to infer locomotor biomechanics in extinct non-avian ...
Bishop PJ, Hocknull SA, Clemente CJ, Hutchinson JR, Farke AA, Barrett RS, Lloyd DG.   +6 more
europepmc   +5 more sources

Re-evaluation of the Haarlem Archaeopteryx and the radiation of maniraptoran theropod dinosaurs. [PDF]

BMC Evol Biol, 2017
Archaeopteryx is an iconic fossil that has long been pivotal for our understanding of the origin of birds. Remains of this important taxon have only been found in the Late Jurassic lithographic limestones of Bavaria, Germany.
Foth C, Rauhut OWM.
europepmc   +4 more sources

Could theropod dinosaurs have evolved to a human level of intelligence?

Journal of Comparative Neurology, Volume 531, Issue 9, Page 975-1006, June 2023., 2023
Images showing models of the theropod dinosaur Troodon formosus and the dinosaur humanoid proposed by Russell and Seguin (1982). Noting that theropod dinosaurs such as troodon had large brains, large grasping hands, and likely binocular vision, Russell and Seguin suggested that a branch of these dinosaurs might have evolved to a human intelligence ...
Anton Reiner
wiley   +1 more source

Review of the tetrapod skull-neck boundary: implications for the evolution of the atlas-axis complex. [PDF]

Biol Rev Camb Philos Soc
ABSTRACT This review describes variation in modern and fossil occiput–atlas–axis complex anatomy of total group Tetrapoda with the aim of documenting the range of structural variation throughout their evolutionary history to establish grounds for comparison of the complex between tetrapod clades.
Korneisel DE, Maddin HC.
europepmc   +2 more sources

Mosaic evolution in an asymmetrically feathered troodontid dinosaur with transitional features. [PDF]

Nat Commun, 2017
Asymmetrical feathers have been associated with flight capability but are also found in species that do not fly, and their appearance was a major event in feather evolution.
Xu X, Currie P, Pittman M, Xing L, Meng Q, Lü J, Hu D, Yu C.   +7 more
europepmc   +4 more sources

Machine learning confirms new records of maniraptoran theropods in Middle Jurassic UK microvertebrate faunas

Papers in Palaeontology, Volume 9, Issue 2, March/April 2023., 2023
Abstract Current research suggests that the initial radiation of maniraptoran theropods occurred in the Middle Jurassic, although their fossil record is known almost exclusively from the Cretaceous. However, fossils of Jurassic maniraptorans are scarce, usually consisting solely of isolated teeth, and their identifications are often disputed.
Simon Wills, Charlie J. Underwood, Paul M. Barrett, Philip Mannion   +3 more
wiley   +1 more source