Results 31 to 40 of about 496 (122)

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

High rates of evolution preceded the origin of birds [PDF]

, 2014
The origin of birds (Aves) is one of the great evolutionary transitions. Fossils show that many unique morphological features of modern birds, such as feathers, reduction in body size, and the semilunate carpal, long preceded the origin of clade Aves ...
Allen, Bapst, Barrett, Beaulieu, Benson, Brusatte, Butler, Campbell, Campione, Carrano, Carrano, Carrano, Chatterjee, Clarke, Dececchi, Dececchi, Dial, Dyke, Eastman, Felsenstein, Freckleton, Gatesy, Gatesy, Gingerich, Gingerich, Godefroit, Gong, Hansen, Harmon, Hu, Hunt, Hunt, Hutchinson, Landis, Lee, Lloyd, Middleton, Nesbitt, Novas, Nudds, O'Connor, O'Meara, Padian, Pagel, Pagel, Pagel, Revell, Revell, Revell, Slater, Sookias, Sullivan, Thomas, Thomas, Turner, Turner, Venditti, Xing, Xu, Xu, Zanno, Zanno, Zhang, Zheng, Zhou   +64 more
core   +1 more source

The geometry of taking flight: Limb morphometrics in Mesozoic theropods

Journal of Morphology, Volume 276, Issue 2, Page 152-166, February 2015., 2015
ABSTRACT Theropoda was one of the most successful dinosaurian clades during the Mesozoic and has remained a dominant component of faunas throughout the Cenozoic, with nearly 10,000 extant representatives. The discovery of Archaeopteryx provides evidence that avian theropods evolved at least 155 million years ago and that more than half of the tenure of
Brandon P. Hedrick, Phillip L. Manning, Eric R. Lynch, Samantha A. Cordero, Peter Dodson   +4 more
wiley   +1 more source

A bony-crested Jurassic dinosaur with evidence of iridescent plumage highlights complexity in early paravian evolution [PDF]

, 2018
The Jurassic Yanliao theropods have offered rare glimpses of the early paravian evolution and particularly of bird origins, but, with the exception of the bizarre scansoriopterygids, they have shown similar skeletal and integumentary morphologies.
Clarke, Julia A, D'Alba Altamirano, Liliana, Eliason, Chad M, Hu, Dongyu, Jiang, Jinkai, Li, Quanguo, Qiu, Rui, Shawkey, Matthew, Xu, Xing, Zhao, Cuilin   +9 more
core   +3 more sources

Theropod fauna from southern Australia indicates high polar diversity and climate-driven dinosaur provinciality.

PLoS ONE, 2012
The Early Cretaceous fauna of Victoria, Australia, provides unique data on the composition of high latitude southern hemisphere dinosaurs. We describe and review theropod dinosaur postcranial remains from the Aptian-Albian Otway and Strzelecki groups ...
Roger B J Benson, Thomas H Rich, Patricia Vickers-Rich, Mike Hall   +3 more
doaj   +1 more source

Theropod (Dinosauria) diversity from the Potiguar Basin (Early-Late Cretaceous Albian-Cenomanian), northeast Brazil [PDF]

, 2020
The theropod record from the Cretaceous of northeastern Brazil is rare and consists mostly of isolated and incomplete remains, with only four species described.
Agnolín, Anderson, Arai, Aranciaga-Rolando, Araripe, Barbosa, Benson, Benson, Bodin, Britt, Brusatte, Canale, Candeiro, Candeiro, Carlos Roberto dos Anjos Candeiro, Carrano, Carvalho, Cassab, Cavin, Contessi, Coria, Coria, Costa, Currie, Derby, Duarte, Duarte, Forster, Franco-Rosas, Frey, Gauthier, Gilmore, Guedes, Harris, Hendrickx, Hendrlrickx, Jokat, Kellner, Kellner, Kellner, Kellner, Kellner, Langer, Lilian Paglarelli Bergqvist, Macdonald, Madsen, Marsh, Marsh, Marsh, Martill, Martinelli, Mateus, Mawson, Medeiros, Medeiros, Motta, Motta, Mussa, Méndez, Naish, Novas, Novas, Novas, Ostrom, Paulo Victor Luiz Gomes da Costa Pereira, Pereira, Pereira, Pessoa Neto, Petri, Pletsch, Price, Price, Rauhut, Reyment, Rossetti, Rossetti, Russell, Santos, Seeley, Senter, Senter, Sereno, Sereno, Silva-Santos, Smith, Stephen Louis Brusatte, Stromer, Stromer, Sues, Tello Saenz, Theo Baptista Ribeiro, Thiago da Silva Marinho, Tykoski, Vasconcelos, Viramonte, Werner, Xu, Xu   +97 more
core   +2 more sources

‘Dinosaur-bird’ macroevolution, locomotor modules and the origins of flight [PDF]

, 2021
S.M.N. is supported by a FPI-UAM 2019 predoctoral grant from the Autonomous University of Madrid. This research was partially funded by project CGL2013-42643P from MINECO (Spain) and PGC2018-094955-A100 from MICIU (Spain).
Hernández Fernández, Manuel, Marugán-Lobón, Jesús, Nebreda, Sergio M.   +2 more
core   +3 more sources

Mosaic evolution in an asymmetrically feathered troodontid dinosaur with transitional features [PDF]

, 2017
Asymmetrical feathers have been associated with flight capability but are also found in species that do not fly, and their appearance was a major event in feather evolution.
A Ennos, A Feduccia, AH Turner, ALR Thomas, AP Russell, C Foth, C Foth, C Swisher, CA Brochu, CA Forster, CW Gilmore, DA Russell, DE Alexander, DY Hu, F Jin, FV Huene, G Dyke, J Gauthier, J Hall, J Lü, JA Clarke, JC Lü, JH Ostrom, M Norell, MA Norell, MA Norell, NE Campione, OC Marsh, P Currie, P Godefroit, P Godefroit, P Senter, P Senter, PA Goloboff, PJ Makovicky, Q Ji, RB Irmis, RN Brandon, RO Prum, RÅ Norberg, S Ji, SJ Nesbitt, SL Brusatte, T Rowe, TA Dececchi, TG Kaye, TJ Feo, TJ Feo, TRJr Holtz, UM Norberg, VA Tucker, X Xu, X Xu, X Xu, X Xu, X Xu, X Xu, X Xu, X Xu, X Xu, X Xu, X Xu, X Xu, X Xu, X Xu, X Xu, X Xu, X Xu, XL Wang, XT Zheng, ZH Zhou   +70 more
core   +2 more sources

A Thick-Skulled Troodontid Theropod from the Late Cretaceous of Mexico

Diversity
Dinosaurs repeatedly evolved adaptations for sexual selection over their 150-million year history, including adaptations for display and intraspecific combat.
Hector E. Rivera-Sylva, Martha C. Aguillón-Martinez, Jose Flores-Ventura, Ivan E. Sánchez-Uribe, Jose Ruben Guzman-Gutierrez, Nicholas R. Longrich   +5 more
doaj   +1 more source

European ornithomimosaurs (Dinosauria, Theropoda) : an undetected record [PDF]

, 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.
Allain, R., Le Loeuff, J., Tournepiche, J. - F., Vullo, R.   +3 more
core   +2 more sources