Results 21 to 30 of about 2,952 (213)

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

Platinum Group Element Traces of CAMP Volcanism Associated With Low‐Latitude Environmental and Biological Disruptions

open access: yesGeophysical Monograph Series, Page 263-304., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jessica H. Whiteside   +3 more
wiley  

+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

A reassessment of Kelmayisaurus petrolicus, a large theropod dinosaur from the Early Cretaceous of China [PDF]

open access: yes, 2012
The Early Cretaceous fossil record of large-bodied theropods from Asia is poor, hindering comparison of Asian predatory dinosaur faunas with those from other continents. One of the few large Asian theropod specimens from this interval is a partial skull (
Stephen L. Brusatte   +12 more
core   +2 more sources

Diversification and germ-line determination revisited: Linking developmental mechanism with species richness

open access: yesFrontiers in Ecology and Evolution, 2016
.– Background: Explanations for asymmetric patterns of diversification continue to challenge paleontologists and neontologists with competing hypotheses within genetic-development and ecological frameworks. In 1988, a hypothesis was proposed that tied a
Brian I Crother   +2 more
doaj   +1 more source

Bird-like anatomy, posture, and behavior revealed by an early jurassic theropod dinosaur resting trace. [PDF]

open access: yesPLoS ONE, 2009
BackgroundFossil tracks made by non-avian theropod dinosaurs commonly reflect the habitual bipedal stance retained in living birds. Only rarely-captured behaviors, such as crouching, might create impressions made by the hands.
Andrew R C Milner   +4 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

Growth dynamics of Australia's polar dinosaurs. [PDF]

open access: yesPLoS ONE, 2011
Analysis of bone microstructure in ornithopod and theropod dinosaurs from Victoria, Australia, documents ontogenetic changes, providing insight into the dinosaurs' successful habitation of Cretaceous Antarctic environments.
Holly N Woodward   +3 more
doaj   +1 more source

The evolution of large-bodied theropod dinosaurs during the Mesozoic in Asia [PDF]

open access: yes, 2010
The fossil record of large-bodied, apex carnivorous theropod dinosaurs in Eastern Asia is now among the best understood in the world, thanks to new discoveries and reinterpretations of long-neglected fossils.
Benson, R. B. J.   +9 more
core   +1 more source

Reanalysis of Wupus agilis (Early Cretaceous) of Chongqing, China as a Large Avian Trace: Differentiating between Large Bird and Small Non-Avian Theropod Tracks. [PDF]

open access: yesPLoS ONE, 2015
Trace fossils provide the only records of Early Cretaceous birds from many parts of the world. The identification of traces from large avian track-makers is made difficult given their overall similarity in size and tridactyly in comparison with traces of
Lida Xing   +7 more
doaj   +1 more source

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