Results 31 to 40 of about 177 (108)

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

An ornithomimosaur from the Campanian Cedar District Formation (Nanaimo Group) of Denman Island, British Columbia, Canada

FACETS
Despite decades of intensive collecting effort in the Upper Cretaceous Nanaimo Group of Vancouver Island, no definitive dinosaur remains have been reported. Here we describe an isolated theropod caudal vertebra from marine sediments of the Campanian-aged
Victoria M. Arbour, Timon S. Bullard, David C. Evans   +2 more
doaj   +1 more source

Temporally calibrated chart of ornithomimosauria, showing the continental distribution of the known taxa and binned body mass.

, 2022
(A) General stratigraphic column of the Cretaceous Period, showing the global distribution of ornithomimosaur taxa divided by continents (inset stratigraphic column shows the local stratigraphy of Mississippi County, where the Eutaw ornithomimosaurs were
Lindsay E. Zanno (11506677), Chinzorig Tsogtbaatar (11113828), Richard Rolke (13982732), Thomas Cullen (9354631), George Phillips (5319437)   +4 more
core   +1 more source

Theropod dinosaur diversity of the lower English Wealden: analysis of a tooth‐based fauna from the Wadhurst Clay Formation (Lower Cretaceous: Valanginian) via phylogenetic, discriminant and machine learning methods

Papers in Palaeontology, Volume 10, Issue 6, November/December 2024.
Abstract The Lower Cretaceous Wealden Supergroup of southern England yields a diverse assemblage of theropod dinosaurs, its taxa being represented by fragments in addition to some of the most informative associated skeletons of the European Mesozoic. Spinosaurids, neovenatorid allosauroids, tyrannosauroids and dromaeosaurids are among reported Wealden ...
Chris T. Barker, Lucy Handford, Darren Naish, Simon Wills, Christophe Hendrickx, Phil Hadland, Dave Brockhurst, Neil J. Gostling   +7 more
wiley   +1 more source

The Impact of Unstable Taxa in Coelurosaurian Phylogeny and Resampling Support Measures for Parsimony Analyses [PDF]

, 2020
Paleontological datasets often have large amounts of missing entries that result in multiple mostparsimonious trees. Highly incomplete and conflictive taxa produce a collapsed strict consensus andseveral methods have been developed for identifying these ...
Goloboff, Pablo Augusto, Pol, Diego
core   +1 more source

The osteology of Shuvosaurus inexpectatus, a shuvosaurid pseudosuchian from the Upper Triassic Post Quarry, Dockum Group of Texas, USA

The Anatomical Record, Volume 307, Issue 4, Page 1175-1238, April 2024.
Abstract A vast array of pseudosuchian body plans evolved during the diversification of the group in the Triassic Period, but few can compare to the toothless, long‐necked, and bipedal shuvosaurids. Members of this clade possess theropod‐like character states mapped on top of more plesiomorphic pseudosuchian character states, complicating our ...
Sterling J. Nesbitt, Sankar Chatterjee
wiley   +1 more source

Reconstruction of the pelvic girdle and hindlimb musculature of the early tetanurans Piatnitzkysauridae (Theropoda, Megalosauroidea)

Journal of Anatomy, Volume 244, Issue 4, Page 557-593, April 2024.
Piatnitzkysauridae were Jurassic theropods that represented one of the earliest lineages to have evolved moderate body size. Here, we reconstructed the hindlimb musculature of this clade, allowing a more complete understanding of myological evolution in theropod pelvic appendages. Abstract Piatnitzkysauridae were Jurassic theropods that represented the
Mauro B. S. Lacerda, Jonathas S. Bittencourt, John R. Hutchinson   +2 more
wiley   +1 more source

Crouching theropod at the seaside. Matching footprints with metatarsal impressions and theropod authopods: a morphometric approach

, 2017
We compare theropod footprints with elongate metatarsal prints from central Italy with known autopod structures in major theropod groups, in order to more accurately define the trackmaker attribution.
Romano, Marco, Citton, Paolo
core   +1 more source

Consensus phylogeny of Ornithomimosauria showing known state of vertebral pneumaticity from the literature and personal observations.

, 2015
Bolded taxonomic names indicate taxa inspected in this study. The common theropod pattern and graphical representation of vertebral pneumaticity is derived from [13].
Amy Davidson (838756), Maria Eugenia Leone Gold (626945), Jonah Choiniere (838755), Mark A. Norell (258792), Stephen L. Brusatte (134303), Roger B. J. Benson (176910), Akinobu Watanabe (838754)   +6 more
core   +1 more source

Preliminary Study on the Reconstruction and Function of the Hyperelongate Neural Spines in the Dorsal Vertebrae of Deinocheirus mirificus (Theropoda: Ornithomimosauria)

Transactions on Social Science, Education and Humanities Research
Deinocheirus is a bizarre and unique theropod dinosaur. The holotype of Deinocheirus was discovered in 1976, but its characteristics and phylogenetic position remained largely enigmatic due to the scarcity of fossil material. This changed in 2014 when Lee et al.
Xin Luo, Chunchi Liao
openaire   +1 more source