Results 31 to 40 of about 557 (139)

Cranial anatomy of Anchiornis huxleyi (Theropoda: Paraves) sheds new light on bird skull evolution [PDF]

古脊椎动物学报 (中英文版)
The origin of birds from theropod dinosaurs, by any measures, is the most eye-catching evolutionary transition in the history of life, which encompasses numerous extensive morphological and biological changes. Compared to postcranium, little progress has
WANG Min, WANG Xiao-Li, ZHENG Xiao-Ting, ZHOU Zhong-He
doaj   +1 more source

Review of the tetrapod skull-neck boundary: implications for the evolution of the atlas-axis complex. [PDF]

Biol Rev Camb Philos Soc
ABSTRACT This review describes variation in modern and fossil occiput–atlas–axis complex anatomy of total group Tetrapoda with the aim of documenting the range of structural variation throughout their evolutionary history to establish grounds for comparison of the complex between tetrapod clades.
Korneisel DE, Maddin HC.
europepmc   +2 more sources

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

A new small deinonychosaur (Dinosauria: Theropoda) from the Late Cretaceous of Patagônia, Argentina

Anais da Academia Brasileira de Ciências, 2011
Here we report on a new small deinonychosaurian theropod, Pamparaptor micros gen. et sp. nov., from the Late Cretaceous of Patagônia, Argentina. Pamparaptor micros exhibits a pedal structure previously unknown among South Américan deinonychosaurians. The
Juan D. Porfiri, Jorge O. Calvo, Domenica dos Santos   +2 more
doaj   +1 more source

Osteology of the unenlagiid theropod Neuquenraptor argentinus from the Late Cretaceous of Patagonia [PDF]

, 2017
Neuquenraptor argentinus was described as the first undoubted deinonychosaurian theropod from Gondwana. The only known specimen is represented by a fragmentary skeleton, including a nearly complete foot, coming from Late Cretaceous beds of Neuquén ...
Agnolin, Federico, Aranciaga Rolando, Alexis Mauro, Brissón Egli, Federico, Novas, Fernando Emilio   +3 more
core   +2 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

Analogy, Amalgams, and Concept Blending [PDF]

, 2016
Concept blending — a cognitive process which allows for the combination of certain elements (and their relations) from originally distinct conceptual spaces into a new unified space combining these previously separate elements, and enables ...
Besold, Tarek R., Kühnberger, Kai-Uwe, Plaza, Enric   +2 more
core   +1 more source

Towards a computational- and algorithmic-level account of concept blending using analogies and amalgams [PDF]

, 2017
Concept blending–a cognitive process which allows for the combination of certain elements (and their relations) from originally distinct conceptual spaces into a new unified space combining these previously separate elements, and enables reasoning and ...
Besold, T. R., Kuhnberger, K-U., Plaza, E.   +2 more
core   +1 more source

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

Basal paravian functional anatomy illuminated by high-detail body outline [PDF]

, 2017
Body shape is a fundamental expression of organismal biology, but its quantitative reconstruction in fossil vertebrates is rare. Due to the absence of fossilized soft tissue evidence, the functional consequences of basal paravian body shape and its ...
Falk, AR, Hartman, SA, Kaye, TG, Pittman, MD, Wang, XL, Xu, XX, Zheng, XT   +6 more
core   +1 more source