Results 91 to 100 of about 1,610 (221)

New perspectives on body size and shape evolution in dinosaurs

open access: yesBiological Reviews, Volume 100, Issue 5, Page 1829-1860, October 2025.
ABSTRACT Diversity in the body shapes and sizes of dinosaurs was foundational to their widespread success during the Mesozoic era. The ability to quantify body size and form reliably is therefore critical to the study of dinosaur biology and evolution.
Matthew Dempsey   +4 more
wiley   +1 more source

Opalized archosaur remains from the Bulldog Shale (Aptian: Lower Cretaceous) of South Australia

open access: yes
Terrestrial reptile remains are very rare in the Lower Cretaceous of South Australia, but include the holotype of the small theropod Kakuru. Here, we review this taxon and other archosaur specimens collected from the Bulldog Shale (Aptian) of Andamooka ...
Benson, R. B. J.   +2 more
core   +1 more source

Osteohistology of the unusually fast‐growing theropod dinosaur Ceratosaurus

open access: yesJournal of Anatomy, Volume 247, Issue 3-4, Page 765-789, September/October 2025.
We report the histology of multiple elements attributed to four individuals of Ceratosaurus. We find that the histology and growth models corroborate previous reports of rapid tissue growth in the genus. Abstract Ceratosaurus is a large‐bodied non‐avian theropod dinosaur known from the Upper Jurassic Morrison Formation of North America and is ...
Riley Sombathy   +2 more
wiley   +1 more source

A new large−bodied theropod dinosaur from the Middle Jurassic of Warwickshire, United Kingdom

open access: yes
Previously undocumented postcranial material from the Chipping Norton Limestone Formation (Middle Jurassic: Lower Bathonian) of Cross Hands Quarry, near Little Compton, Warwickshire represents a new large−bodied theropod dinosaur,distinct from the ...
Benson, R. B. J., Jonathan, D.
core   +1 more source

Fig. 16 in Cranial Osteology of the Theropod Dinosaur Incisivosaurus gauthieri (Theropoda: Oviraptorosauria)

open access: yes, 2009
Fig. 16. Dorsal and ventral views of the endocranial cast of the holotype of Incisivosaurus gauthieriPublished as part of Balanoff, Amy M., Xu, Xing, Kobayashi, Yoshitsugu, Matsufune, Yusuke & Norell, Mark A., 2009, Cranial Osteology of the Theropod ...
Balanoff, Amy M.   +4 more
core   +1 more source

Taxonomic notes on Megapnosaurus and 'Syntarsus' (Theropoda: Coelophysidae)

open access: yes, 2022
The genus name Syntarsus Raath 1969 is preoccupied by the genus Syntarsus Fairmaire 1869. The replacement name Megapnosaurus Ivie et al. 2001 was proposed but its usage is inconsistent due to both controversy on the validity of the nomenclatural act proposing Megapnosaurus and possible synonymy between it and Coelophysis Cope 1889.
McDavid, Skye N, Bugos, Jeb E
openaire   +2 more sources

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

open access: yesJournal 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   +7 more
wiley   +1 more source

FIG. 1 in A new carcharodontosaurid (Dinosauria, Theropoda) from the Upper Cretaceous of Argentina

open access: yes, 2006
FIG. 1. — Location map of the site "Cañadón del Gato" (★) where the remains of Mapusaurus roseae n. gen., n. sp. were found.Published as part of Coria, R. A. & Currie, P.
Coria, R. A., Currie, P. J.
core   +1 more source

Theropoda Marsb 1881

open access: yes, 1981
Published as part of John S. McIntosh, 1981, Annotated catalogue of the dinosaurs (Reptilia, Archosauria) in the collections of Carnegie Museum of Natural History, pp.
openaire   +2 more sources

An insect †Archaeopteryx: Cretaceous amber fossil elucidates the evolution of complex host detection and ovipositor mechanisms in parasitoid woodwasps (Hymenoptera: Orussoidea)

open access: yesSystematic Entomology, Volume 50, Issue 3, Page 630-645, July 2025.
We describe †Cretovelona orussopteryx n. gen. & sp. from Kachin amber. The fossil is examined with synchrotron scanning and integrated into an existing morphological data set for Orussoidea. This fossil parasitoid wasp displays a unique character combination demonstrating intermediate conditions in evolving the complex features employed in echo ...
Lars Vilhelmsen   +4 more
wiley   +1 more source

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