Results 31 to 40 of about 634 (144)

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

open access: yes, 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   +3 more
core   +2 more sources

The phylogenetic affinities of the bizarre Late Cretaceous Romanian theropod Balaur bondoc (Dinosauria, Maniraptora): dromaeosaurid or flightless bird? [PDF]

open access: yesPeerJ, 2015
The exceptionally well-preserved Romanian dinosaur Balaur bondoc is the most complete theropod known to date from the Upper Cretaceous of Europe. Previous studies of this remarkable taxon have included its phylogenetic interpretation as an aberrant ...
Andrea Cau, Tom Brougham, Darren Naish
doaj   +2 more sources

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

open access: yesPalaeontology, 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   +4 more
wiley   +1 more source

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

open access: yesAnais 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   +2 more
doaj   +1 more source

A second Cretaceous ornithuromorph bird from the Changma Basin, Gansu Province, Northwestern China [PDF]

open access: yes, 2010
Finely-bedded lacustrine deposits of the Aptian (Lower Cretaceous) Xiagou Formation exposed in the Changma Basin of Gansu Province, northwestern China, have yielded numerous fossil vertebrate remains, including approximately 100 avian specimens.
Atterholt, J   +5 more
core   +2 more sources

First find of the dromaeosauridae (dinosauria: dromaeosauridae) ungual from the late cretaceous Blagoveschensk dinosaur locality (Amur Region, Russia)

open access: yesДоклады Академии наук, 2019
Dromaeosaurid ungual from the Blagoveschensk locality studied for the first time. Dromaeosaurid presence amongst other taxa points on high biodiversity in Amur region, on the eve of K-T event.
I. Yu. Bolotsky   +2 more
openaire   +2 more sources

Shake a tail feather: the evolution of the theropod tail into a stiff aerodynamic surface [PDF]

open access: yes, 2013
Theropod dinosaurs show striking morphological and functional tail variation; e.g., a long, robust, basal theropod tail used for counterbalance, or a short, modern avian tail used as an aerodynamic surface.
A Tyson   +89 more
core   +10 more sources

Theropod teeth from the upper Barremian (Lower Cretaceous) of Vadillos-1, Spain [PDF]

open access: yes, 2022
The upper Barremian (Lower Cretaceous) palaeontological site of Vadillos-1 is located in the North of the Cuenca Province, Spain. It includes a sedimentary succession in “Weald” facies of brown and grey mudstones and red clays, corresponding to an ...
Alcalde Fuentes, María Rosario   +3 more
core   +4 more sources

A New Specimen of Autroraptor cabazai Novas, Pol. Canale, Porfiri and Calvo, 2008 (Dinosauria, Theropoda, Unenlagiidae) from the Latest Cretaceous (Maastrichtian) of Río Negro, Argentina [PDF]

open access: yes, 2012
There were considerable differences in Late Cretaceous faunas of the Northern and Southern Hemispheres, although the differences were breaking down during Campanian and Maastrichtian times with the appearance of hadrosaurids in Antarctica and South ...
Currie, Philip J.   +1 more
core   +1 more source

Multivariate and Cladistic Analyses of Isolated Teeth Reveal Sympatry of Theropod Dinosaurs in the Late Jurassic of Northern Germany.

open access: yesPLoS ONE, 2016
Remains of theropod dinosaurs are very rare in Northern Germany because the area was repeatedly submerged by a shallow epicontinental sea during the Mesozoic.
Oliver Gerke, Oliver Wings
doaj   +1 more source

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