Corpus ID: 83923793

Saurischian monophyly and the origin of birds

  title={Saurischian monophyly and the origin of birds},
  author={J. Gauthier},
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. Expand
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. Expand
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. Expand
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. Expand
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. Expand
Solving a dinosaurian puzzle: the identity of Aliwalia rex Galton
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. Expand
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. Expand
Late Jurassic theropod dinosaur bones from the Langenberg Quarry (Lower Saxony, Germany) provide evidence for several theropod lineages in the central European archipelago
Finds in the Langenberg Quarry confirm the presence of several taxa of theropod dinosaurs in the archipelago and add to the growing understanding ofTheropod diversity and evolution during the Late Jurassic of Europe. Expand
Megaraptorid (Theropoda: Tetanurae) Partial Skeletons from the Upper Cretaceous Bajo Barreal Formation of Central Patagonia, Argentina: Implications for the Evolution of Large Body Size in Gondwanan MegaraptoranS
ABSTRACT We describe two partial postcranial skeletons belonging to the enigmatic theropod dinosaur clade Megaraptoridae from the Upper Cretaceous (lower Cenomanian–upper Turonian) Bajo BarrealExpand
Osteohistology and growth dynamics of the Brazilian noasaurid Vespersaurus paranaensis Langer et al., 2019 (Theropoda: Abelisauroidea)
The predominant parallel-fibered bone matrix suggests that Vespersaurus grew more slowly than most theropods, including other abelisauroids, in a pattern shared with the noasaurines Masiakasaurus knopfleri from Madagascar and CPPLIP 1490 from Brazil. Expand