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Early ornithischian dinosaurs: the Triassic record
Abstract Ornithischian dinosaurs are one of the most taxonomically diverse dinosaur clades during the Mesozoic, yet their origin and early diversification remain virtually unknown. In recent years,Expand
Reassessment of the Aetosaur ‘Desmatosuchus’ chamaensis with a reanalysis of the phylogeny of the Aetosauria (Archosauria: Pseudosuchia)
Synopsis Study of aetosaurian archosaur material demonstrates that the dermal armour of Desmatosuchus chamaensis shares almost no characters with that of Desmatosuchus haplocerus. Instead, theExpand
A critical re‐evaluation of the Late Triassic dinosaur taxa of North America
Synopsis The North American Triassic dinosaur record has been repeatedly cited as one of the most complete early dinosaur assemblages. The discovery of Silesaurus from Poland and the recognition thatExpand
The Late Triassic pseudosuchian Revueltosaurus callenderi and its implications for the diversity of early ornithischian dinosaurs
Dental characters previously used to place Revueltosaurus within the Ornithischia evolved convergently among other archosaur taxa, and cannot be used to diagnose ornithischian dinosaur teeth. Expand
Hindlimb Osteology and Distribution of Basal Dinosauromorphs from the Late Triassic of North America
ABSTRACT The recent discovery of early dinosauromorphs from North America demonstrates that they were contemporaries with dinosaurs and other basal archosaurs during a substantial portion of theExpand
High-resolution U-Pb ages from the Upper Triassic Chinle Formation (New Mexico, USA) support a diachronous rise of dinosaurs
Abstract Though the Late Triassic preserves major paleoenvironmental fluctuations and is key for understanding the evolution of Mesozoic and modern terrestrial ecosystems, comparisons of LateExpand
The Late Triassic (Norian) Adamanian–Revueltian tetrapod faunal transition in the Chinle Formation of Petrified Forest National Park, Arizona
  • W. Parker, J. Martz
  • Geology
  • Earth and Environmental Science Transactions of…
  • 1 September 2010
ABSTRACT Recent stratigraphic revisions of the Upper Triassic Chinle Formation of Petrified Forest National Park, in conjunction with precise and accurate documentation of fossil tetrapodExpand
Revised Lithostratigraphy of the Sonsela Member (Chinle Formation, Upper Triassic) in the Southern Part of Petrified Forest National Park, Arizona
These investigations demonstrate the neglected necessity of walking out contacts and mapping when constructing lithostratigraphic models, and providing UTM coordinates and labeled photographs for all measured sections. Expand
Aetosauria: a clade of armoured pseudosuchians from the Upper Triassic continental beds
Aetosauria is a clade of obligately quadrupedal, heavily armoured pseudosuchians known from Upper Triassic strata on every modern continent except Australia and Antarctica, and there is increasing evidence that at least some aetosaurs relied on invertebrates and/or small vertebrates as a food source. Expand
Revised phylogenetic analysis of the Aetosauria (Archosauria: Pseudosuchia); assessing the effects of incongruent morphological character sets
  • W. Parker
  • Biology, Medicine
  • PeerJ
  • 21 January 2016
A new phylogenetic analysis of the Aetosauria includes more than 40 new characters that focus on better sampling the cranial and endoskeletal regions, and represents the most comprenhensive phylogeny of the clade to date. Expand