• Corpus ID: 83923793

Saurischian monophyly and the origin of birds

  title={Saurischian monophyly and the origin of birds},
  author={Jacques-Antoine Gauthier},
The osteology and affinities of Eotyrannus lengi, a tyrannosauroid theropod from the Wealden Supergroup of southern England
The analysis supports the inclusion of Megaraptora within Tyrannosauroidea and thus increases Cretaceous tyrannosauroid diversity and disparity and supports a proposal that Eotyrannus might belong within Megarptora, however, is based on character states not present in the taxon.
A European giant: a large spinosaurid (Dinosauria: Theropoda) from the Vectis Formation (Wealden Group, Early Cretaceous), UK
A combination of features—including the presence of spinodiapophyseal webbing on an anterior caudal vertebra—suggest that this spinosaurid reported from the Vectis Formation is a member of Spinosauridae, though a lack of convincing autapomorphies precludes the identification of a new taxon.
Postcranial skeletal anatomy of the holotype and referred specimens of Buitreraptor gonzalezorum Makovicky, Apesteguía and Agnolín 2005 (Theropoda, Dromaeosauridae), from the Late Cretaceous of Patagonia
The holotype is the most complete specimen yet found, so an exhaustive description of it provides much valuable anatomical information, and a revised phylogenetic analysis recovered Buitreraptor as an unenlagiine dromaeosaurid, in agreement with previous works.
Synchrotron scanning reveals amphibious ecomorphology in a new clade of bird-like dinosaurs
This lineage adds an amphibious ecomorphology to those evolved by maniraptorans: it acquired a predatory mode that relied mainly on neck hyperelongation for food procurement, it coupled the obligatory bipedalism of theropods with forelimb proportions that may support a swimming function, and it developed postural adaptations convergent with short-tailed birds.
A specimen-level phylogenetic analysis and taxonomic revision of Diplodocidae (Dinosauria, Sauropoda)
The use of a specimen-, rather than species-based approach increases knowledge of intraspecific and intrageneric variation in diplodocids, and the study demonstrates how specimen-based phylogenetic analysis is a valuable tool in sauropod taxonomy, and potentially in paleontology and taxonomy as a whole.
The phylogenetic position of the Pterosauria within the Archosauromorpha re-examined
The data set was updated with additional characters and taxa from recent analyses, tested as before, and when analysed suggested that the Pterosauria were basal archosauriforms well outside the crown group Archosaurusia.
Material Postcraneano de Proterochampsa barrionuevoi Reig 1959 (Diapsida: Archosauriformes) del Triásico Superior del Centro-oeste de Argentina
A new and almost complete specimen of Proterochampsa barrionuevoi is described in detail and an emended diagnosis considering neurocranial features —semilunar depression ventrolaterally exposed, basisphenoidal fossa surround by a rostrolateraly V-shaped ridge with convex branches— is provided.
Solving a dinosaurian puzzle: the identity of Aliwalia rex Galton
  • A. Yates
  • Geography, Environmental Science
  • 2007
Eucnemesaurus fortis Van Hoepen 1920 from the Late Triassic of South Africa is demonstrated to be the senior synonym of the puzzling dinosaur taxon Aliwalia rex Galton 1985 and it supports the paraphyletic nature of the traditional ‘prosauropod’ assemblage.
Early dinosaurs: A phylogenetic study
A new cladistic analysis of the early dinosaur radiation was performed to assess the relationships among the three major clades (Ornithischia, Sauropodomorpha and Theropoda) and to define the phylogenetic position of the basal members of the group.
A newly recognized theropod assemblage from the Lewisville Formation (Woodbine Group; Cenomanian) and its implications for understanding Late Cretaceous Appalachian terrestrial ecosystems
While the terrestrial fossil record of the mid-Cretaceous interval (Aptian to Cenomanian) in North America has been poorly studied, the recent focus on fossil localities from the western United