Results 121 to 130 of about 2,952 (213)

A large-clawed theropod (Dinosauria: Tetanurae) from the Lower Cretaceous of Australia and the Gondwanan origin of megaraptorid theropods

open access: yes, 2016
Megaraptoridae comprises a clade of enigmatic Gondwanan theropods with characteristic hypertrophied claws on the first and second manual digits. The majority of megaraptorids are known from South America, although a single genus (Australovenator) plus ...
CAU, ANDREA   +5 more
core   +1 more source

The last dinosaurs of Brazil: The Bauru Group and its implications for the end-Cretaceous mass extinction

open access: yesAnais da Academia Brasileira de Ciências
The non-avian dinosaurs died out at the end of the Cretaceous, ~66 million years ago, after an asteroid impact. The prevailing hypothesis is that the effects of the impact suddenly killed the dinosaurs, but the poor fossil record of latest Cretaceous ...
STEPHEN L. BRUSATTE   +2 more
doaj   +1 more source

The Last Weaponized Arm: Macroevolutionary Trends of Megaraptorid Manual Claw I and Forelimb Integration in medium- to large-bodied non-avian theropods

open access: yes
From the Jurassic to the Cretaceous, most medium- to large-bodied non-avian theropods evolved toward predominantly head-driven predatory strategies.
Enzo E Seculi Pereyra, Lucio M Ibiricu
core   +1 more source

Theropod dinosaurs from Argentina

open access: yes, 2016
Theropoda includes all the dinosaurs more closely related to birds than to sauropodomorphs (long-necked dinosaurs) and ornithischians (bird-hipped dinosaurs). The oldest members of the group are early Late Triassic in age, and non-avian theropods flourished during the rest of the Mesozoic until they vanished in the Cretaceous-Palaeogene mass extinction.
Ezcurra, Martin Daniel   +1 more
openaire   +1 more source

Jurassic avialan reveals stepwise evolution of bony tail in birds. [PDF]

open access: yesSci Adv
Wang M   +11 more
europepmc   +1 more source

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