Results 101 to 110 of about 2,952 (213)

Anatomy, ontogeny, and phylogeny of coelophysoid theropods [PDF]

open access: yes, 2005
textCoelophysoid theropods (Dinosauria: Saurischia) were viewed as members of Ceratosauria in early cladistic phylogenetic hypotheses, but more recent analyses placed Coelophysoidea and Dilophosaurus as successively closer outgroups to Neotheropoda ...
Tykoski, Ronald S.
core   +1 more source

The dentition of tyrannosauroid theropods: a review

open access: yesDiscover Geoscience
Tyrannosauroidea is a clade of early-diverging carnivorous coelurosaur theropods known from the Middle Jurassic to Late Cretaceous that includes the eponymous Tyrannosaurus rex and its closest relatives. One of the most notable diagnostic features of the
Carlos A. Hernández-Luna   +3 more
doaj   +1 more source

Skeletal pathologies in extant crocodilians as a window into the paleopathology of fossil archosaurs

open access: yesThe Anatomical Record, Volume 309, Issue 10, Page 2698-2724, October 2026.
Abstract Crocodilians, together with birds, are the only extant relatives to many extinct archosaur groups, making them highly important for interpreting paleopathological conditions in a phylogenetic disease bracketing model. Despite this, comprehensive data on osteopathologies in crocodilians remain scarce.
Alexis Cornille   +6 more
wiley   +1 more source

A comparison between dinosaur footprints from the Middle Jurassic of the Isle of Skye, Scotland, UK, and Shell, Wyoming, USA [PDF]

open access: yes, 2008
Measurements of Middle Jurassic tridactyl dinosaur tracks from the Bathonian, Lealt Shale, Valtos Sandstone, Duntulm and Kilmaluag formations of the Isle of Skye, UK, are compared to the same measurements taken for dinosaur footprints from the Bajocian ...
Brett-Surman, M.K., Clark, N.D.L.
core   +1 more source

Elusive Cretaceous Gondwanan theropods: The footprint evidence from central Argentina

open access: yes, 2019
New findings of well-preserved theropod dinosaur footprints from the Albian Lagarcito Formation (Sierras de Las Quijadas National Park, San Luis, Argentina) are described and its paleoenvironmental and stratigraphic context is discussed.
Rivarola, David Luciano   +4 more
core   +1 more source

Histology and fossil diagenesis of a pterosaur tooth from the Crato Formation (Lower Cretaceous of Brazil)

open access: yesThe Anatomical Record, Volume 309, Issue 10, Page 2739-2751, October 2026.
Abstract Pterosaur dental biology remains poorly understood despite its importance for comprehending feeding strategies and flight adaptations. Here, we present the first comprehensive histological analysis of an ornithocheiriform pterosaur tooth from the Lower Cretaceous Crato Formation (Santana Group, Northeast Brazil).
Tito Aureliano   +3 more
wiley   +1 more source

Pedal Claw Curvature in Birds, Lizards and Mesozoic Dinosaurs - Complicated Categories and Compensating for Mass-Specific and Phylogenetic Control [PDF]

open access: yes, 2012
PubMed ID: 23227184This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are ...
Charlotte E. Miller (115421)   +32 more
core   +1 more source

Theropod Locomotion [PDF]

open access: yesAmerican Zoologist, 2000
James O. Farlow   +4 more
openaire   +1 more source

Evidence for avian intrathoracic air sacs in a new predatory dinosaur from Argentina.

open access: yesPLoS ONE, 2008
BackgroundLiving birds possess a unique heterogeneous pulmonary system composed of a rigid, dorsally-anchored lung and several compliant air sacs that operate as bellows, driving inspired air through the lung.
Paul C Sereno   +5 more
doaj   +1 more source

FIG. 1 in Theropods of the Judith River Formation of dinosaur Provincial Park, Alberta, Canada

open access: yes, 1987
FIG. 1 Theropod frontals from Dinosaur Provincial Park. (a) Troodon formosus. TMP 86.49. 10; (b) Dromicelomimus samueli, TMP 85.56.62; (c) cf. Erilcosaurus sp., NMC 12355; (d) Saurornitholestes langstoni, TMP 86. 77.
Currie, P.J.
core   +1 more source

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