Results 11 to 20 of about 731 (174)

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

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

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

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

European ornithomimosaurs (Dinosauria, Theropoda): an undetected record

open access: yesGeologica Acta, 2014
Early Cretaceous ornithomimosaurian theropod dinosaurs have been reported from various localities in Asia, whereas they remain poorly represented and extremely rare in North America, Africa and Europe.
R. ALLAIN   +3 more
doaj   +7 more sources

The oldest record of Alvarezsauridae (Dinosauria: Theropoda) in the Northern Hemisphere.

open access: yesPLoS ONE, 2017
Procoelous caudal vertebrae, a carpometacarpus with a hypertrophied metacarpal II, and robust proximal and ungual phalanges of manual digit II of a small theropod dinosaur from the Upper Cretaceous (Turonian) Bissekty Formation at Dzharakuduk, Uzbekistan,
Alexander Averianov, Hans-Dieter Sues
doaj   +5 more sources

Allosaurus europaeus (Theropoda: Allosauroidea) Revisited and Taxonomy of the Genus

open access: yesDiversity
Allosaurus is one of the most famous theropod dinosaurs, but the validity and relationships between the different species have been confusing and often questioned.
André Burigo, Octávio Mateus
doaj   +2 more sources

New theropod (Tetanurae: Avetheropoda) material from the ‘mid’-Cretaceous Griman Greek Formation at Lightning Ridge, New South Wales, Australia [PDF]

open access: yesRoyal Society Open Science, 2019
The limited fossil record of Australian Cretaceous theropods is dominated by megaraptorids, reported from associated and isolated material from the Early Cretaceous of Victoria and the ‘Mid’-Cretaceous of central-north New South Wales and central ...
Tom Brougham   +2 more
doaj   +1 more source

Natural Frequency Method: estimating the preferred walking speed of Tyrannosaurus rex based on tail natural frequency

open access: yesRoyal Society Open Science, 2021
Locomotor energetics are an important determinant of an animal's ecological niche. It is commonly assumed that animals minimize locomotor energy expenditure by selecting gait kinematics tuned to the natural frequencies of relevant body parts.
Pasha A. van Bijlert   +2 more
doaj   +1 more source

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