Results 21 to 30 of about 177 (108)

Herbivorous ecomorphology and specialization patterns in theropod dinosaur evolution. [PDF]

Proc Natl Acad Sci U S A, 2011
Interpreting key ecological parameters, such as diet, of extinct organisms without the benefit of direct observation or explicit fossil evidence poses a formidable challenge for paleobiological studies.
Zanno LE, Makovicky PJ.
europepmc   +2 more sources

Machine learning confirms new records of maniraptoran theropods in Middle Jurassic UK microvertebrate faunas

Papers in Palaeontology, Volume 9, Issue 2, March/April 2023., 2023
Abstract Current research suggests that the initial radiation of maniraptoran theropods occurred in the Middle Jurassic, although their fossil record is known almost exclusively from the Cretaceous. However, fossils of Jurassic maniraptorans are scarce, usually consisting solely of isolated teeth, and their identifications are often disputed.
Simon Wills, Charlie J. Underwood, Paul M. Barrett, Philip Mannion   +3 more
wiley   +1 more source

Relative skull size evolution in Mesozoic archosauromorphs: potential drivers and morphological uniqueness of erythrosuchid archosauriforms

Palaeontology, Volume 65, Issue 3, May/June 2022., 2022
Abstract Little is known about the large‐scale evolutionary patterns of skull size relative to body size, and the possible drivers behind these patterns, in Archosauromorpha. For example, the large skulls of erythrosuchids, a group of non‐archosaurian archosauromorphs from the Early and Middle Triassic, and of theropod dinosaurs are regarded as ...
Jordan Bestwick, Pedro L. Godoy, Susannah C. R. Maidment, Martín D. Ezcurra, Mia Wroe, Thomas J. Raven, Joseph A. Bonsor, Richard J. Butler, Kenneth Angielczyk   +8 more
wiley   +1 more source

Upper Cretaceous European theropod palaeobiodiversity, palaeobiogeography and the intra‐Maastrichtian faunal turnover: new contributions from the Iberian fossil site of Laño

Papers in Palaeontology, Volume 8, Issue 1, January/February 2022., 2022
Abstract A total of 227 theropod teeth have so far been recovered from the upper Campanian Laño site (northern Iberian Peninsula). The teeth were studied for their qualitative and quantitative features. From the theropod sample found at Laño, seven morphotypes attributed to five taxa are identified: a medium to large abelisaurid (Arcovenator sp.) and ...
Erik Isasmendi, Angelica Torices, José Ignacio Canudo, Philip J. Currie, Xabier Pereda‐Suberbiola, David Button   +5 more
wiley   +1 more source

A giant ornithomimosaur from the Early Cretaceous of China [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2010
Da-Qing Li, Peter J Makovický, Mark Norell   +2 more
exaly   +2 more sources

Morphological disparity in theropod jaws: comparing discrete characters and geometric morphometrics

Palaeontology, Volume 63, Issue 2, Page 283-299, March 2020., 2020
Abstract Disparity, the diversity of form and function of organisms, can be assessed from cladistic or phenetic characters, and from discrete characters or continuous characters such as landmarks, outlines, or ratios. But do these different methods of assessing disparity provide comparable results?
Joep Schaeffer, Michael J. Benton, Emily J. Rayfield, Thomas L. Stubbs, Kenneth Angielczyk   +4 more
wiley   +1 more source

Age, depositional history, and paleoclimatic setting of Early Cretaceous dinosaur assemblages from the Sao Khua Formation (Khorat Group), Thailand

, 2022
We describe the sedimentology, geochronology, and geochemistry of the Early Cretaceus Sao Khua Formation of the Khorat Basin, northeastern Thailand, and report a temporal range adjustment for its dinosaurian assemblage.
Gates, Terry A., Wasinee Aswasereelert, M. Ryan King, Foley, Elliot K., Terry A. Gates, Elliot K. Foley, Hanta, Rattanaphorn, Sasa-on Khansubha, King, M. Ryan, Ethan G. Hyland, Aswasereelert, Wasinee, Khansubha, Sasa-on, Berndt, David, Ryan T. Tucker, Lindsay E. Zanno, Rattanaphorn Hanta, Roberts, Eric M., Zanno, Lindsay E., Tucker, Ryan T., Hyland, Ethan G., Eric M. Roberts, David Berndt   +21 more
core   +1 more source

Data from: Macroevolutionary trends in theropod dinosaur feeding mechanics [PDF]

, 2021
Figure S1. Comparison of von Mises stress plots of non-avialan theropod mandibles under a posterior-bite scenario. Left: original mandible; Right: simulated deformed mandible, showing the deformation (displacement) of the original mandible under loading ...
Ma, Wai Sum, Lautenschlager, Stephan; id_orcid, Butler, Richard J., Lautenschlager, Stephan, Pittman, Michael, Ma, Waisum, Butler, Richard; id_orcid   +6 more
core   +1 more source

Skeletal completeness of the non‐avian theropod dinosaur fossil record

Palaeontology, Volume 62, Issue 6, Page 951-981, November 2019., 2019
Abstract Non‐avian theropods were a highly successful clade of bipedal, predominantly carnivorous, dinosaurs. Their diversity and macroevolutionary patterns have been the subject of many studies. Changes in fossil specimen completeness through time and space can bias our understanding of macroevolution.
Daniel D. Cashmore, Richard J. Butler, Roger Benson   +2 more
wiley   +1 more source

The impact of poor sampling of polymorphism on cladistic analysis

Cladistics, Volume 32, Issue 3, Page 317-334, June 2016., 2016
Abstract Despite its ubiquity in the natural world, polymorphism is commonly disregarded or poorly sampled in phylogenetic analyses due to deliberate sampling strategy, inadequate sampling effort and limited specimen availability. Poor sampling of intraspecific variation engenders differential sampling of morphs within polymorphic species, which could ...
Akinobu Watanabe
wiley   +1 more source