Results 1 to 10 of about 2,363 (235)

Avialan-like brain morphology in Sinovenator (Troodontidae, Theropoda) [PDF]

Communications Biology
Many modifications to the skull and brain anatomy occurred along the lineage encompassing non-avialan theropod dinosaurs and modern birds. Anatomical changes to the endocranium include an enlarged endocranial cavity, relatively larger optic lobes that ...
Congyu Yu, Akinobu Watanabe, Zichuan Qin, J. Logan King, Lawrence M. Witmer, Qingyu Ma, Xing Xu   +6 more
doaj   +5 more sources

Ontogenetic Changes in Endocranial Anatomy in Gorgosaurus libratus (Theropoda: Tyrannosauridae) Provide Insight Into the Evolution of the Tyrannosauroid Endocranium. [PDF]

J Comp Neurol
Over the past two decades, increased accessibility to computed tomography (CT) scanners has greatly facilitated documentation of the endocranium in numerous extinct theropod taxa.
Voris JT, Therrien F, Ridgely RC, Witmer LM, Zelenitsky DK.   +4 more
europepmc   +3 more sources

Early Cretaceous troodontine troodontid (Dinosauria: Theropoda) from the Ohyamashimo Formation of Japan reveals the early evolution of Troodontinae. [PDF]

Sci Rep
A new troodontid dinosaur, Hypnovenator matsubaraetoheorum gen. et sp. nov., is described based on an articulated postcranial skeleton recovered from the fluvial deposits of the Albian Ohyamashimo Formation of the Sasayama Group in Tambasasayama City ...
Kubota K, Kobayashi Y, Ikeda T.
europepmc   +4 more sources

On the first Baryonychinae (Theropoda, Spinosauridae) teeth from South America.

Zootaxa, 2023
We report the first occurrence in South America of spinosaurid specimens belonging to the clade Baryonychinae. The material comprises three tooth crowns recovered from the Lower Cretaceous (Berriasian-Valanginian) of the Feliz Deserto Formation, State of
M. B. Lacerda, Paulo Rafael Carrilho Aragão, Fabiana S. Vieira, Marcos A. F. Sales, A. Liparini   +4 more
semanticscholar   +5 more sources

First unambiguous record of pneumaticity in the axial skeleton of alvarezsaurians (Theropoda: Coelurosauria). [PDF]

PLoS One
Bonapartenykus ultimus is an alvarezsaurid theropod from the Upper Cretaceous of Patagonia, Argentina. This species is represented by the holotype specimen and several referred specimens, many of which have pneumatic structures. Pneumaticity involves the
Windholz GJ, Meso JG, Wedel MJ, Pittman M.   +3 more
europepmc   +2 more sources

Morphology of the maxilla informs about the type of predation strategy in the evolution of Abelisauridae (Dinosauria: Theropoda). [PDF]

Sci Rep
Abelisauridae is a clade of theropods distinguished by short, ornamented skulls and strongly reduced forelimbs. They represented the most abundant predatory dinosaurs in Gondwana during the Cretaceous.
Pereyra EES, Vrdoljak J, Ezcurra MD, González-Dionis J, Paschetta C, Méndez AH.   +5 more
europepmc   +2 more sources

New information on Bonapartenykus (Alvarezsauridae: Theropoda) from the Allen Formation (middle Campanian-lower Maastrichtian) of Río Negro Province, Patagonia, Argentina clarifies the Patagonykinae body plan. [PDF]

PLoS One
Alvarezsauria is a group of morphologically distinctive, medium- to small-sized later-diverging coelurosaurian theropod dinosaurs, whose record ranges from the Late Jurassic to the Late Cretaceous.
Meso JG, Choiniere JN, Baiano MA, Brusatte SL, Canale JI, Salgado L, Pol D, Pittman M.   +7 more
europepmc   +2 more sources

Re-evaluation of the Bahariya Formation carcharodontosaurid (Dinosauria: Theropoda) and its implications for allosauroid phylogeny. [PDF]

PLoS One
The first partial skeleton of a carcharodontosaurid theropod was described from the Egyptian Bahariya Oasis by Ernst Stromer in 1931. Stromer referred the specimen to the species Megalosaurus saharicus, originally described on the basis of isolated teeth
Kellermann M, Cuesta E, Rauhut OWM.
europepmc   +2 more sources

A new oviraptorosaur (Dinosauria: Theropoda) from the end-Maastrichtian Hell Creek Formation of North America. [PDF]

PLoS One
Caenagnathidae is a clade of derived, Late Cretaceous oviraptorosaurian theropods from Asia and North America. Because their remains are rare and often fragmentary, caenagnathid diversity is poorly understood. Anzu wyliei is the only caenagnathid species
Atkins-Weltman KL, Simon DJ, Woodward HN, Funston GF, Snively E.   +4 more
europepmc   +2 more sources

Dinosaur teeth from the Lower Cretaceous Jiufotang Formation of western Liaoning, China [PDF]

PeerJ
Here, two dinosaur teeth are discovered from the Lower Cretaceous Jiufotang Formation in Longcheng, Chaoyang, western Liaoning, China. This discovery marks a new fossil site for the Jehol Biota, characterized by three-dimensionally preserved fossils ...
Ya-Lei Yin, Yang Li, Jin Hu, Hong-Gang Zhang   +3 more
doaj   +3 more sources