Results 181 to 190 of about 1,610 (221)
Some of the next articles are maybe not open access.
The Phylogeny of Ceratosauria (Dinosauria: Theropoda)
Journal of Systematic Palaeontology, 2008Synopsis Recent discoveries and analyses have drawn increased attention to Ceratosauria, a taxonomically and morphologically diverse group of basal theropods. By the time of its first appearance in the Late Jurassic, the group was probably globally distributed.
Carrano, Matthew T., Sampson, S. D.
openaire +2 more sources
Kinematic model of tyrannosaurid (dinosauria: theropoda) arctometatarsus function
Journal of Morphology, 2002AbstractWe present a hypothesis of tyrannosaurid foot function termed the “tensile keystone model,” in which the triangular central metatarsal and elastic ligaments dynamically strengthened the foot. The tyrannosaurid arctometatarsus, in which the central metatarsal is proximally constricted, displays osteological correlates of distal intermetatarsal ...
Snively, Eric, Anthony P. Russell
openaire +2 more sources
The Anatomical Record, 2023
AbstractMegaraptora is a group of enigmatic, carnivorous non‐avian theropod dinosaurs from the Cretaceous of Asia, Australia, and especially South America. Perhaps the most striking aspect of megaraptoran morphology is the large, robustly constructed forelimb that, in derived members of the clade, terminates in a greatly enlarged manus with ...
Alexis M. Aranciaga Rolando +5 more
openaire +3 more sources
AbstractMegaraptora is a group of enigmatic, carnivorous non‐avian theropod dinosaurs from the Cretaceous of Asia, Australia, and especially South America. Perhaps the most striking aspect of megaraptoran morphology is the large, robustly constructed forelimb that, in derived members of the clade, terminates in a greatly enlarged manus with ...
Alexis M. Aranciaga Rolando +5 more
openaire +3 more sources
Did oviraptorosaurs (Dinosauria; Theropoda) inhabit Argentina?
Cretaceous Research, 2007Abstract In this contribution a putative oviraptorosaurian cervical vertebra discovered in the Campanian-Maastrichtian El Brete Formation from Salta Province, NW Argentina is analysed. Based on the resemblances of this vertebra with those of the basal neoceratosaurian Elaphrosaurus and with the noasaurid Noasaurus , the Salta specimen is ...
Federico L. Agnolin +1 more
openaire +1 more source
Phylogenetic taxonomy of the Coelurosauria (Dinosauria: Theropoda)
Journal of Paleontology, 1996Phylogenetic taxonomy, that component of phylogenetic systematics concerned with the verbal representation (rather than the reconstruction or estimation) of phylogenetic relationships, was developed by de Queiroz and Gauthier (1990, 1992, 1994). Under phylogenetic taxonomy, all taxon names are names of clades (i.e., an ancestor and all of that ancestor'
openaire +1 more source
A bizarre, humped Carcharodontosauria (Theropoda) from the Lower Cretaceous of Spain
Nature, 2010Carcharodontosaurs were the largest predatory dinosaurs, and their early evolutionary history seems to be more intricate than was previously thought. Until recently, carcharodontosaurs were restricted to a group of large theropods inhabiting the Late Cretaceous Gondwanan land masses, but in the last few years Laurasian evidence has been causing a ...
Francisco, Ortega +2 more
openaire +2 more sources
Forearm range of motion in Allosaurus fragilis (Dinosauria: Theropoda)
Historical BiologyForelimb bones of the Early Jurassic theropod Allosaurus fragilis were digitally manipulated based on three-dimensional (3D) digital models. Bony articular surface margins were used as limits to determine the range of motion (ROM) for each forelimb joint, and to test functional hypotheses of forelimb usage.
Qingqing Liang +5 more
openaire +1 more source
Anatomy, systematics, and evolution of Oviraptorosauria (Dinosauria, Theropoda)
2019Here I describe new oviraptorosaur specimens and add to our knowledge of the anatomy, growth, behaviour, ecology, and evolution of oviraptorosaurs. Oviraptorosaurs were a diverse group of theropods known from a long history of discovery and a relatively abundant fossil record. Most analyses divide the toothless members of the clade into three families:
openaire +1 more source