Results 1 to 10 of about 1,610 (221)

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

open access: yesCommunications 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   +6 more
doaj   +5 more sources

A reassessment of the taxonomic validity of Dynamoterror dynastes (Theropoda: Tyrannosauridae)

open access: yesZoodiversity, 2020
Associated fragmentary materials of tyrannosaurid theropod, Dynamoterror dynastes McDonald et al., 2018, were reported in 2018 from the Upper Cretaceous Menefee Formation of New Mexico. However, two originally proposed autapomorphies (i.e. prefrontonasal
Chan-gyu Yun
doaj   +4 more sources

Theropoda Osborn 1906

open access: yes, 1982
THEROPODA incertae sedis Fig. 6 Material: Teeth: UCM 39503 (UCMP-V5711) H 3.2 mm, W 1.8 mm; UCM 45063 (UCMP-V5620) H 2.8 mm, W 1.8 mm; UCMP 124986 (UCMP-V73087) H 1.6 mm, W 1.3 mm; UCMP 124987 (UCMP-V73087) H 2.8 mm, W 2.2 mm; and UCMP 124988 (UCMP ...
Carpenter, Kenneth
core   +3 more sources

Postcranial osteology of Beipiaosaurus inexpectus (Theropoda: Therizinosauria).

open access: yesPLoS ONE, 2021
Beipiaosaurus inexpectus, from the Lower Cretaceous Yixian Formation (Sihetun locality, near Beipiao), Liaoning, China, is a key taxon for understanding the early evolution of therizinosaurians.
Chun-Chi Liao   +3 more
doaj   +4 more sources

Abelisauroidea (Theropoda, Dinosauria) from Africa: a review of the fossil record [PDF]

open access: yesPapéis Avulsos de Zoologia, 2023
The Continental African abelisauroid theropod dinosaur fossil record from the Jurassic-Cretaceous periods is becoming increasingly better understood, and offers great insight into the evolution and biogeography of this long-lived group of carnivores ...
André Luis de Souza-Júnior   +4 more
doaj   +3 more sources

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

open access: yesPeerJ
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   +3 more
doaj   +3 more sources

Notas Sobre Spinosauridae (Theropoda, Dinosauria) [PDF]

open access: yesAnuário do Instituto de Geociências, 2005
Spinosaur remains were collected in Africa, Europa, Asia and Brazil, coming from deposits with ages ranging from the Late Jurassic to the Late Cretaceous.
Elaine Batista Machado   +1 more
doaj   +3 more sources

Reconsidering the Avian Nature of the Oviraptorosaur Brain (Dinosauria: Theropoda). [PDF]

open access: yesPLoS ONE, 2014
The high degree of encephalization characterizing modern birds is the product of a long evolutionary history, our understanding of which is still largely in its infancy.
Amy M Balanoff, G S Bever, Mark A Norell
doaj   +4 more sources

Statistical evaluation of character support reveals the instability of higher-level dinosaur phylogeny [PDF]

open access: yesScientific Reports, 2023
The interrelationships of the three major dinosaur clades (Theropoda, Sauropodomorpha, and Ornithischia) have come under increased scrutiny following the recovery of conflicting phylogenies by a large new character matrix and its extensively modified ...
David Černý, Ashley L. Simonoff
doaj   +2 more sources

Forearm Range of Motion in Australovenator wintonensis (Theropoda, Megaraptoridae). [PDF]

open access: yesPLoS ONE, 2015
The hypertrophied manual claws and modified manus of megaraptoran theropods represent an unusual morphological adaptation among carnivorous dinosaurs. The skeleton of Australovenator wintonensis from the Cenomanian of Australia is among the most complete
Matt A White   +6 more
doaj   +7 more sources

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