Results 91 to 100 of about 5,330 (201)

Hindlimb biomechanics of Lagosuchus talampayensis (Archosauria, Dinosauriformes), with comments on skeletal morphology

Journal of Anatomy, Volume 246, Issue 6, Page 948-973, June 2025.
The study constructs a 3D whole‐body biomechanical model of the Late Triassic archosaurian reptile Lagosuchus talampayensis, which includes reconstructions of the hindlimb musculature. The process of constructing the model revealed that numerous limb bones curated with the main specimens are from other, as‐yet‐undetermined archosaurs.
Alejandro Otero, Peter J. Bishop, John R. Hutchinson   +2 more
wiley   +1 more source

Osteohistology of a Triassic dinosaur population reveals highly variable growth trajectories typified early dinosaur ontogeny

Scientific Reports, 2022
Intraspecific variation in growth trajectories provides a fundamental source of variation upon which natural selection acts. Recent work hints that early dinosaurs possessed elevated levels of such variation compared to other archosaurs, but ...
Daniel E. Barta, Christopher T. Griffin, Mark A. Norell   +2 more
doaj   +1 more source

Braincase ofPanphagia protos(Dinosauria, Sauropodomorpha)

Journal of Vertebrate Paleontology, 2012
ABSTRACT We describe a partial braincase of the basal sauropodomorph Panphagia protos from the Upper Triassic (mid-Carnian) horizons of the Ischigualasto Formation. The disarticulated braincase from a subadult individual includes one frontal, both parietals, one prootic, and the supraoccipital.
Martínez, Ricardo Néstor, Haro, Jose Augusto, Apaldetti, Graciela Cecilia   +2 more
openaire   +3 more sources

How smart was T. rex? Testing claims of exceptional cognition in dinosaurs and the application of neuron count estimates in palaeontological research

The Anatomical Record, Volume 307, Issue 12, Page 3685-3716, December 2024.
Abstract Recent years have seen increasing scientific interest in whether neuron counts can act as correlates of diverse biological phenomena. Lately, Herculano‐Houzel (2023) argued that fossil endocasts and comparative neurological data from extant sauropsids allow to reconstruct telencephalic neuron counts in Mesozoic dinosaurs and pterosaurs, which ...
Kai R. Caspar, Cristián Gutiérrez‐Ibáñez, Ornella C. Bertrand, Thomas Carr, Jennifer A. D. Colbourne, Arthur Erb, Hady George, Thomas R. Holtz Jr, Darren Naish, Douglas R. Wylie, Grant R. Hurlburt   +10 more
wiley   +1 more source

A new semi‐fossorial thescelosaurine dinosaur from the Cenomanian‐age Mussentuchit Member of the Cedar Mountain Formation, Utah

The Anatomical Record, Volume 307, Issue 12, Page 3717-3781, December 2024.
Abstract Thescelosaurines are a group of early diverging, ornithischian dinosaurs notable for their conservative bauplans and mosaic of primitive features. Although abundant within the latest Cretaceous ecosystems of North America, their record is poor to absent in earlier assemblages, leaving a large gap in our understanding of their evolution ...
Haviv M. Avrahami, Peter J. Makovicky, Ryan T. Tucker, Lindsay E. Zanno   +3 more
wiley   +1 more source

The Venice specimen ofOuranosaurus nigeriensis(Dinosauria, Ornithopoda)

PeerJ, 2017
Ouranosaurus nigeriensisis an iconic African dinosaur taxon that has been described on the basis of two nearly complete skeletons from the Lower Cretaceous Gadoufaoua locality of the Ténéré desert in Niger. The entire holotype and a few bones attributed to the paratype formed the basis of the original description by Taquet (1976).
Bertozzo, Filippo, Dalla Vecchia, Fabio Marco, Fabbri, Matteo   +2 more
openaire   +9 more sources

Cancellous bone and theropod dinosaur locomotion. Part I—an examination of cancellous bone architecture in the hindlimb bones of theropods [PDF]

, 2018
This paper is the first of a three-part series that investigates the architecture of cancellous (‘spongy’) bone in the main hindlimb bones of theropod dinosaurs, and uses cancellous bone architectural patterns to infer locomotor biomechanics in extinct ...
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core   +2 more sources

Description of a new specimen of Haplocanthosaurus from the Dry Mesa Dinosaur Quarry

The Anatomical Record, Volume 307, Issue 12, Page 3782-3800, December 2024.
Abstract A new specimen of Haplocanthosaurus is described based on bones excavated from the Late Jurassic Dry Mesa Dinosaur Quarry near Delta, Colorado. The specimen consists of seven dorsal vertebrae and a right tibia and is identified as Haplocanthosaurus based on the dorsally angled transverse processes, tall neural arch peduncles, low parapophyses ...
Colin Boisvert, Brian Curtice, Mathew Wedel, Ray Wilhite   +3 more
wiley   +1 more source

2. Remarks on the geological distribution of the Dinosauria [PDF]

Proceedings of the Geologists' Association, 1871
n ...
openaire   +2 more sources

The effects of the spreading of the Central Atlantic during the Middle Jurassic on dinosaur faunas [PDF]

, 2012
The spreading of the Central Atlantic is a complex series of events that include a ridge jump to the east and a ridge jump to the west at c. 170Ma and c. 162Ma respectively.
Clark, N.D.L.
core