Results 41 to 50 of about 204 (109)

Tunasniyoj, a dinosaur tracksite from the Jurassic-Cretaceous boundary of Bolivia

Anais da Academia Brasileira de Ciências, 2011
Here we report a superbly preserved and profusely represented five-ichnotaxa dinosaur track assemblage near Icla village, 100 km southeast of Sucre, Bolivia.
Sebastián Apesteguía, Pablo A. Gallina
doaj   +1 more source

New teeth of nodosaurid ankylosaur from the Lower Cretaceous of Southern England [PDF]

Acta Palaeontologica Polonica, 2013
We present new nodosaurid teeth from the Valanginian of Bexhill, Sussex and the Barremian of the Isle of Wight, the first from the Lower Cretaceous of the United Kingdom. Teeth found during the mid-1800s from the Valanginian and ascribed to the nodosaurid Hylaeosaurus are probably from sauropod dinosaurs.
William Blows, Kerri Honeysett
openaire   +1 more source

Intraskeletal histovariability and skeletochronology in an ornithopod dinosaur from the Maestrazgo Basin (Teruel, Spain)

Journal of Anatomy, Volume 247, Issue 3-4, Page 643-664, September/October 2025.
Abstract Ornithopods are an extinct group of dinosaurs that were particularly abundant and diverse in the Cretaceous of the Iberian Peninsula, and whose abundance in the Maestrazgo Basin has allowed numerous taxa to be identified over the last decade. Many of these fossil remains are still taxonomically indeterminate and require a more detailed study ...
Juan Maíllo, Jerome Hidalgo‐Sanz, José Manuel Gasca, José Ignacio Canudo, Miguel Moreno‐Azanza   +4 more
wiley   +1 more source

Diversity and convergences in the evolution of feeding adaptations in ankylosaurs (Dinosauria: Ornithischia) [PDF]

Historical Biology, 2016
AbstractAnkylosaurian dinosaurs were low-browsing quadrupeds that were traditionally thought of as simple orthal pulpers exhibiting minimal tooth occlusion during feeding, as in many extant lizards. Recent studies, however, have demonstrated that effective chewing with tooth occlusion and palinal jaw movement was present in some members of this group ...
Ősi, Attila, Prondvai, Edina, Mallon, Jordan, Bodor, Emese Réka   +3 more
openaire   +2 more sources

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

Journal of Anatomy, Volume 247, Issue 3-4, Page 790-818, September/October 2025.
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.
Henry S. Sharpe, Yan‐yin Wang, Thomas W. Dudgeon, Mark J. Powers, S. Amber Whitebone, Colton C. Coppock, Aaron D. Dyer, Corwin Sullivan   +7 more
wiley   +1 more source

Hidden Armour: The Passive Protective Function of Caudal Osteoderms in Snakes

Journal of Morphology, Volume 286, Issue 2, February 2025.
Well‐developed caudal osteoderms were discovered in shield‐tailed snakes (Uropeltidae). Dermal armour at the tail tip likely provides passive protection against predators, though roles in locomotion or phragmosis cannot be excluded. Our findings emphasise the functional and evolutionary versatility of osteoderms and highlight the need for further ...
Petra Frýdlová, Jan Dudák, Veronika Tymlová, Jan Žemlička, Jiří Moravec, Daniel Frynta   +5 more
wiley   +1 more source

Review of osteoderm function and future research directions

Journal of Zoology, Volume 325, Issue 1, Page 1-24, January 2025.
Osteoderms are bone plates in the skin that occur in virtually all major tetrapod clades. Much has been speculated about their function, but many questions remain unanswered. This review provides an overview of the current state of knowledge and future research directions in this field.
R. Ebel, A. Herrel, T. M. Scheyer, J. S. Keogh   +3 more
wiley   +1 more source

Tail Weaponry in Ankylosaurs and Glyptodonts: An Example of a Rare but Strongly Convergent Phenotype [PDF]

The Anatomical Record, 2019
ABSTRACTThe unusual clubbed tails of glyptodonts among mammals and ankylosaurines among dinosaurs most likely functioned as weapons of intraspecific combat or interspecific defense and are characterized by stiffening of the distal tail and, in some taxa, expansion of the distal tail tip.
Victoria M. Arbour, Lindsay E. Zanno
openaire   +2 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

Theropod dinosaur diversity of the lower English Wealden: analysis of a tooth‐based fauna from the Wadhurst Clay Formation (Lower Cretaceous: Valanginian) via phylogenetic, discriminant and machine learning methods

Papers in Palaeontology, Volume 10, Issue 6, November/December 2024.
Abstract The Lower Cretaceous Wealden Supergroup of southern England yields a diverse assemblage of theropod dinosaurs, its taxa being represented by fragments in addition to some of the most informative associated skeletons of the European Mesozoic. Spinosaurids, neovenatorid allosauroids, tyrannosauroids and dromaeosaurids are among reported Wealden ...
Chris T. Barker, Lucy Handford, Darren Naish, Simon Wills, Christophe Hendrickx, Phil Hadland, Dave Brockhurst, Neil J. Gostling   +7 more
wiley   +1 more source