Results 41 to 50 of about 912 (199)

Histological evidence for a supraspinous ligament in sauropod dinosaurs [PDF]

Royal Society Open Science, 2015
Supraspinous ossified rods have been reported in the sacra of some derived sauropod dinosaurs. Although different hypotheses have been proposed to explain the origin of this structure, histological evidence has never been provided to support or reject ...
Ignacio A. Cerda, Gabriel A. Casal, Rubén D. Martinez, Lucio M. Ibiricu   +3 more
doaj   +1 more source

The Tail of the Late Jurassic Sauropod Giraffatitan brancai: Digital Reconstruction of Its Epaxial and Hypaxial Musculature, and Implications for Tail Biomechanics

Frontiers in Earth Science, 2020
Dinosaur locomotion and biomechanics, especially of their pelvic girdles and hindlimbs, have been analyzed in numerous studies. However, detailed volumetric musculoskeletal models of their tails are rarely developed.
Verónica Díez Díaz, Verónica Díez Díaz, Oliver E. Demuth, Oliver E. Demuth, Daniela Schwarz, Heinrich Mallison, Heinrich Mallison   +6 more
doaj   +1 more source

Description of the skull, braincase, and dentition of Moschognathus whaitsi (Dinocephalia, Tapinocephalia), and its palaeobiological and behavioral implications. [PDF]

Anat Rec (Hoboken)
Abstract A subadult Moschognathus whaitsi from the Eastern Cape Province, South Africa, was scanned using synchrotron radiation X‐ray computed tomography (SRXCT). Its subadult state allowed the cranial bones and teeth to be identified and individually reconstructed in 3D.
Lafferty T, Norton LA, Duhamel A, Benoit J.   +3 more
europepmc   +2 more sources

Cranial osteology of Bajadasaurus pronuspinax (Sauropoda, Dicraeosauridae)

Historical Biology, 2023
The cranial remains of the holotype of the Lower Cretaceous Bajada Colorada Formation (Neuquén, Argentina) Bajadasaurus pronuspinax and its associated 3D model are studied and compared herein. These materials comprise a complete braincase, skull roof and occiput, several periorbital elements, several palatal elements, a partially complete upper jaw and
Juan P. Garderes, Pablo A. Gallina, John A. Whitlock, Nestor Toledo   +3 more
openaire   +2 more sources

Bite and tooth marks on sauropod dinosaurs from the Morrison Formation [PDF]

PeerJ, 2023
Tooth-marked bones provide important evidence for feeding choices made by extinct carnivorous animals. In the case of the dinosaurs, most bite traces are attributed to the large and robust osteophagous tyrannosaurs, but those of other large carnivores ...
Roberto Lei, Emanuel Tschopp, Christophe Hendrickx, Mathew J. Wedel, Mark Norell, David W.E. Hone   +5 more
doaj   +2 more sources

Skull morphology and histology indicate the presence of an unexpected buccal soft tissue structure in dinosaurs. [PDF]

J Anat
A combined approach of osteology and histology was used to examine the cheek regions of dinosaurs. Strong evidence was found for a soft tissue in this region connecting the zygoma to the mandible, here named the ‘exoparia’. Abstract Unlike mammals, reptiles typically lack large muscles and ligaments that connect the zygoma to the mandible.
Sharpe HS, Wang YY, Dudgeon TW, Powers MJ, Whitebone SA, Coppock CC, Dyer AD, Sullivan C.   +7 more
europepmc   +2 more sources

A diverse Late Cretaceous vertebrate tracksite from the Winton Formation of Queensland, Australia [PDF]

PeerJ, 2021
The Upper Cretaceous ‘upper’ Winton Formation of Queensland, Australia is world famous for hosting Dinosaur Stampede National Monument at Lark Quarry Conservation Park, a somewhat controversial tracksite that preserves thousands of tridactyl dinosaur ...
Stephen F. Poropat, Matt A. White, Tim Ziegler, Adele H. Pentland, Samantha L. Rigby, Ruairidh J. Duncan, Trish Sloan, David A. Elliott   +7 more
doaj   +2 more sources

Taxonomic and stratigraphic update of the material historically attributed to Megalosaurus from Portugal [PDF]

Acta Palaeontologica Polonica
The first paleontological works on Mesozoic vertebrates from Portugal, carried out from the end of the 19th and the first half of the 20th century, provided the discovery of significant collections of vertebrate fossils.
Elisabete Malafaia, Pedro Mocho, Fernando Escaso, Ivan Narvaéz, Francisco Ortega   +4 more
doaj   +1 more source

What's inside a sauropod limb? First three‐dimensional investigation of the limb long bone microanatomy of a sauropod dinosaur, Nigersaurus taqueti (Neosauropoda, Rebbachisauridae), and implications for the weight‐bearing function

Palaeontology, Volume 66, Issue 4, July/August 2023., 2023
Abstract Various terrestrial tetrapods convergently evolved to gigantism (large body sizes and masses), the most extreme case being sauropod dinosaurs. Heavy weight‐bearing taxa often show external morphological features related to this condition, but also adequacy in their limb bone inner structure: a spongiosa filling the medullary area and a rather ...
Rémi Lefebvre, Ronan Allain, Alexandra Houssaye   +2 more
wiley   +1 more source

A nearly complete skull of the sauropod dinosaur Diamantinasaurus matildae from the Upper Cretaceous Winton Formation of Australia and implications for the early evolution of titanosaurs

Royal Society Open Science, 2023
Titanosaurian sauropod dinosaurs were diverse and abundant throughout the Cretaceous, with a global distribution. However, few titanosaurian taxa are represented by multiple skeletons, let alone skulls.
Stephen F. Poropat, Philip D. Mannion, Samantha L. Rigby, Ruairidh J. Duncan, Adele H. Pentland, Joseph J. Bevitt, Trish Sloan, David A. Elliott   +7 more
doaj   +1 more source