Results 11 to 20 of about 4,308 (203)

Paleobiogeographic evolution and distribution of Carcharodontosauridae (Dinosauria, Theropoda) during the middle Cretaceous of North Africa [PDF]

open access: yesPapéis Avulsos de Zoologia, 2018
Over the last few decades, the systematics and evolution of carcharodontosaurids, a group of large predatory dinosaurs, from North Africa have been better understood mainly due the discovery of new species.
Carlos Roberto dos Anjos Candeiro   +3 more
doaj   +5 more sources

Unenlagiinae revisited: dromaeosaurid theropods from South América [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2011
Over the past two decades, the record of South American unenlagiine dromaeosaurids was substantially increased both in quantity as well as in quality of specimens.
Federico A. Gianechini   +1 more
doaj   +6 more sources

Dinosaur footprints and other Ichnofauna from the Cretaceous Kem Kem Beds of Morocco [PDF]

open access: yes, 2014
We describe an extensive ichnofossil assemblage from the likely Cenomanian-age 'lower' and 'upper' units of the 'Kem Kem beds' in southeastern Morocco.
Baidder, Lahssen   +7 more
core   +21 more sources

Two new compsognathid-like theropods show diversified predation strategies in theropod dinosaurs. [PDF]

open access: yesNatl Sci Rev
ABSTRACT The Compsognathidae was originally considered an early-diverging clade of coelurosaur theropods. However, recent study suggests that Compsognathidae is not monophyletic. Here, we describe two new compsognathid-like species, Sinosauropteryx lingyuanensis sp. nov. and Huadanosaurus sinensis gen. et sp. nov.
Qiu R, Wang X, Jiang S, Meng J, Zhou Z.
europepmc   +3 more sources

The theropod furcula [PDF]

open access: yesJournal of Morphology, 2009
AbstractThe furcula is a structure formed by the midline fusion of the clavicles. This is the element which is unique to theropods and is important for understanding the link between birds and other theropods. New specimens from basal theropods suggest that the furcula appeared very early in theropod history.
Sterling J, Nesbitt   +4 more
openaire   +2 more sources

Lower rotational inertia and larger leg muscles indicate more rapid turns in tyrannosaurids than in other large theropods [PDF]

open access: yesPeerJ, 2019
Synopsis Tyrannosaurid dinosaurs had large preserved leg muscle attachments and low rotational inertia relative to their body mass, indicating that they could turn more quickly than other large theropods.
Eric Snively   +11 more
doaj   +2 more sources

Comments and corrections on 3D modeling studies of locomotor muscle moment arms in archosaurs [PDF]

open access: yes, 2015
© 2015 Bates et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is ...
Allen   +15 more
core   +14 more sources

Cranial muscle reconstructions quantify adaptation for high bite forces in Oviraptorosauria

open access: yesScientific Reports, 2022
Oviraptorosaurians are an unusual and probably herbivorous group of theropod dinosaurs that evolved pneumatised crania with robust, toothless jaws, apparently adapted for producing a strong bite.
Luke E. Meade, Waisum Ma
doaj   +1 more source

Functional space analyses reveal the function and evolution of the most bizarre theropod manual unguals

open access: yesCommunications Biology, 2023
Biomechanical and shape analyses explore the function of forelimb claws, revealing adaptations for digging and display in maniraptoran theropods.
Zichuan Qin   +3 more
doaj   +1 more source

The osteology and affinities of Eotyrannus lengi, a tyrannosauroid theropod from the Wealden Supergroup of southern England [PDF]

open access: yesPeerJ, 2022
Eotyrannus lengi Hutt et al., 2001 from the Lower Cretaceous Wessex Formation (part of the Wealden Supergroup) of the Isle of Wight, southern England, is described in detail, compared with other theropods, and evaluated in a new phylogenetic analysis ...
Darren Naish, Andrea Cau
doaj   +2 more sources

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