Results 91 to 100 of about 2,952 (213)

The Biomechanics of Terrestrial Locomotion in Theropods

, 2017
The non-avian theropod dinosaurs are arguably some of the most iconic of extinct animals. One aspect of non-avian theropod biology that has always been of interest is terrestrial locomotion, as well as how it evolved on the line to modern birds.
Bishop, Peter James
core   +1 more source

Dental Microwear Texture Analysis on Radular Teeth

Advanced Materials Interfaces, Volume 13, Issue 19, 6 October 2026.
3D microwear textures reveal how gastropod radular teeth respond to controlled abrasive contact. Distinct surface signatures distinguish regular abrasion from fracture‐dominated material removal, showing how mineralized coatings, fibrous cores, and substrate properties jointly shape wear and failure in a biological scraping interface.
Wencke Krings, Stanislav N. Gorb, Ellen Schulz‐Kornas   +2 more
wiley   +1 more source

Hints of the early Jehol Biota: important dinosaur footprint assemblages from the Jurassic-Cretaceous boundary Tuchengzi Formation in Beijing, China.

PLoS ONE, 2015
New reports of dinosaur tracksites in the Tuchengzi Formation in the newly established Yanqing Global Geopark, Beijing, China, support previous inferences that the track assemblages from this formation are saurischian-dominated.
Lida Xing, Jianping Zhang, Martin G Lockley, Richard T McCrea, Hendrik Klein, Luis Alcalá, Lisa G Buckley, Michael E Burns, Susanna B Kümmell, Qing He   +9 more
doaj   +1 more source

Osteological correlates of the respiratory and vascular systems in the neural canals of Mesozoic ornithurines Ichthyornis and Janavis

The Anatomical Record, Volume 309, Issue 10, Page 2725-2738, October 2026.
Abstract In birds, the neural canal houses a variety of anatomical structures including the spinal cord, meninges, spinal vasculature, and respiratory diverticula. Among these, paramedullary diverticula and the extradural dorsal spinal vein may leave behind osteological correlates in the form of pneumatic foramina and fossae, and a bilobed geometry of ...
Jessie Atterholt, M. Grace Burton, Mathew J. Wedel, Juan Benito, Ellen Fricano, Daniel J. Field   +5 more
wiley   +1 more source

Bony cranial ornamentation linked to rapid evolution of gigantic theropod dinosaurs

Nature Communications, 2016
Many of the theropod dinosaurs, the group including Tyrannosaurus rex, had bony ornamentation on their skulls. Here, Gates et al. show that such ornaments are associated with greater body size and accelerated body size evolution in theropods; however ...
Terry A. Gates, Chris Organ, Lindsay E. Zanno   +2 more
doaj   +1 more source

A new megaraptoran dinosaur from the Lower Cretaceous Wessex Formation, UK, and its implications for theropod evolution and biogeographyA new megaraptoran dinosaur from the Lower Cretaceous Wessex Formation, UK, and its implications for theropod evolution and biogeography [PDF]

Royal Society Open Science
Theropod dinosaur remains from the Barremian (Lower Cretaceous) Wessex Formation of the Isle of Wight, UK, are rare and often fragmentary. Here, we present a previously undescribed braincase from this formation that represents a new coelurosaurian ...
Cassius Morrison, Charlie R. Scherer, Philip Mannion, Laura B. Porro, Brett Clark, Daniel D. Folkes, Paul M. Barrett   +6 more
doaj   +1 more source

Interpretative outline drawing of track-bearing level at Qianjiadian tracksite IU with trackways and isolated tracks of large sauropods, medium-sized sauropods and theropods.

, 2015
Interpretative outline drawing of track-bearing level at Qianjiadian tracksite IU with trackways and isolated tracks of large sauropods, medium-sized sauropods and theropods.
Richard T. McCrea (603065), Lida Xing (309643), Martin G. Lockley (374112), Lisa G. Buckley (603066), Hendrik Klein (615909), Susanna B. Kümmell (676122), Luis Alcalá (491777), Jianping Zhang (161794), Michael E. Burns (309648), Qing He (351975)   +9 more
core   +1 more source

Evidence of large theropods from the Middle Jurassic of the Mahajanga basin, NW Madagascar, with implications for the ceratosaurian pedal ungual evolution.

, 2007
Two large theropod remains from the Middle Jurassic (Isalo IIIb, Bathonian) of the Mahajanga Basin, NW Madagascar, are here described. They consist of a large tooth crown and a pedal ungual.
Pasini, G., CAU, ANDREA, Maganuco, S., Dal Sasso, C.   +3 more
core   +1 more source

An Antarctic cretaceous theropod [PDF]

, 1996
Fil: Brandoni de Gasparini, Zulma Nélida. División Paleontología Vertebrados. Facultad de Ciencias Naturales y Museo.
Molnar, R.E., López Angriman, Alejandro, Brandoni de Gasparini, Zulma Nélida   +2 more
openaire  

A detailed redescription of a skeletally immature ‘Redondasaurus’ suggests ontogenetic transformations in the taxon mirror phytosaurian morphological evolution

The Anatomical Record, Volume 309, Issue 10, Page 2656-2697, October 2026.
Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley   +1 more source