Results 61 to 70 of about 6,936 (207)

A new Heterodontosaurus specimen elucidates the unique ventilatory macroevolution of ornithischian dinosaurs

eLife, 2021
Ornithischian dinosaurs were ecologically prominent herbivores of the Mesozoic Era that achieved a global distribution by the onset of the Cretaceous. The ornithischian body plan is aberrant relative to other ornithodiran clades, and crucial details of ...
Viktor J Radermacher, Vincent Fernandez, Emma R Schachner, Richard J Butler, Emese M Bordy, Michael Naylor Hudgins, William J de Klerk, Kimberley EJ Chapelle, Jonah N Choiniere   +8 more
doaj   +1 more source

A new sauropod titanosaur from the Plottier Formation (Upper Cretaceous) of Patagonia (Argentina) [PDF]

, 2011
This paper presents a new titanosaur sauropod, collected from levels of reddish clays assigned to the Plottier Formation (Coniacian-Santonian). The holotype of Petrobrasaurus puestohernandezi gen. et. sp. nov.
Canudo, J.I., Cerda, I., Filippi, L.S., García, R., Garrido, A., Otero, A., Salgado, J.L.   +6 more
core   +4 more sources

Hindlimb functional morphology and locomotor biomechanics of the small Late Triassic pseudosuchian reptile Gracilisuchus stipanicicorum (Archosauria: Gracilisuchidae)

Journal of Anatomy, EarlyView.
A three‐dimensional biomechanical model of the musculoskeletal system is used to analyse the potential locomotor functions of the small (~1 kg) Late Triassic archosaurian reptile Gracilisuchus stipanicicorum. The study finds that, potentially like the ancestral archosaur, this taxon was probably quadrupedal, plantigrade and neither strongly sprawling ...
Agustina Lecuona, Emily Keeble, Yuting Lin, John R. Hutchinson   +3 more
wiley   +1 more source

Silesaurid (Archosauria: Dinosauriformes) remains from the base of the Dockum Group (Late Triassic: Otischalkian) of Texas provide new insights to the North American record of dinosauriforms

The Anatomical Record, Volume 309, Issue 2, Page 293-313, February 2026.
Abstract Silesaurids (Archosauria: Dinosauriformes) are found in Middle to Upper Triassic deposits across Pangea, but few stratigraphic sections record the evolution of the group in one geographic area over millions of years. Here, we describe silesaurid remains from the oldest of the Upper Triassic stratigraphic sequence from the base of the Dockum ...
Frederick B. Tolchard, Brynden W. Perkins, Sterling J. Nesbitt   +2 more
wiley   +1 more source

Delapparentia turolensis nov. gen et sp., un nuevo dinosaurio iguanodontoideo (Ornithischia: Ornithopoda) en el Cretácico Inferior de Galve

Estudios Geologicos, 2011
Se redescribe un esqueleto postcraneal de dinosaurio ornitópodo asignado por Albert de Lapparent en 1960 a Iguanodon bernissartensis. Procede del yacimiento de La Maca 3, de edad Barremiense inferior (Formación Camarillas), y consta de varias vértebras ...
J. I. Ruiz-Omeñaca
doaj   +1 more source

A re-evaluation of the enigmatic dinosauriform Caseosaurus crosbyensis from the Late Triassic of Texas, USA and its implications for early dinosaur evolution [PDF]

Acta Palaeontologica Polonica, 2018
The holotype specimen of the Late Triassic dinosauriform Caseosaurus crosbyensis is redescribed and evaluated phylogenetically for the first time, providing new anatomical information and data on the earliest dinosaurs and their evolution within the ...
Matthew G. Baron, Megan E. Williams
doaj   +1 more source

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]

, 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 ...
Abourachid, Alexander, Allen, Allen, Allmendinger, Attene, Bakker, Bates, Bates, Bates, Bates, Beer, Benson, Biewener, Biewener, Biewener, Bishop, Bishop, Bishop, Bishop, Bishop, Blob, Brochu, Brusatte, Butcher, Campione, Cardozo, Carrano, Carrano, Carrano, Carrano, Christiansen, Christiansen, Clack, Dececchi, Delp, Farlow, Farlow, Fujiwara, Gao, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gatesy, Gilmore, Heers, Henderson, Henderson, Holtz, Horner, Hotton, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Hutchinson, Jacobson, Johnson, Kambic, Kambic, Keller, Kemp, Lai, Lambe, Lautenschlager, Lee, Marsh, Martelli, McCrea, Molnar, Norell, Norell, Osborn, Ostrom, Paul, Pauwels, Pierce, Pittman, Rauhut, Reilly, Roberts, Rubenson, Russell, Sellers, Sellers, Snively, Stevens, Taylor, Thewissen, Thulborn, Tsai, Tsai, Tsuihiji, Unwin, Valente, Van Der Reest, Villette, Wall-Scheffler, Wilson, Xu, Xu, Zelenitsky   +117 more
core   +3 more sources

Semantic primitives and compositionality: An Annual Review of Information Science and Technology (ARIST) paper

Journal of the Association for Information Science and Technology, Volume 77, Issue 1, Page 198-223, January 2026.
Abstract The term semantic primitives refers to a set of basic, atomic concepts from which all other (compound) concepts are constructed. It presupposes the principle of compositionality—the idea that complex items or expressions can be formed by combining simpler constituents.
Birger Hjørland
wiley   +1 more source

A well-preserved vertebra provides new insights into rebbachisaurid sauropod caudal anatomical and pneumatic features [PDF]

Acta Palaeontologica Polonica
Rebbachisauridae is a clade of sauropod dinosaurs whose maximum diversification and abundance are known from the Cretaceous of South America. We describe an anterior caudal vertebra, MDPA-Pv 007, from the Upper Cretaceous of Argentine Patagonia, whose ...
GUILLERMO J. WINDHOLZ, JUAN D. PORFIRI, DOMENICA DOS SANTOS, FLAVIO BELLARDINI, MATHEW J. WEDEL   +4 more
doaj   +1 more source

Semicircular canal morphology in Rodentia and its relationship to locomotion

Journal of Anatomy, Volume 247, Issue 5, Page 953-969, November 2025.
Here, we present a selection of rodent inner ear 3D models in the lateral view, with rodents from seven locomotor categories (left to right: fossorial, semifossorial, semiaquatic, terrestrial, ricochetal, arboreal, and gliding). Semicircular canal (SCC) morphology, including radius of curvature and shape, can be differentiated between specialized forms
Lily Hou, Ornella C. Bertrand, Hiruni N. Mudannayake, Campbell Rolian, Susanne Cote   +4 more
wiley   +1 more source