The oldest unequivocal records of Dinosauria were unearthed from Late Triassic rocks
(approximately 230 Ma) accumulated over extensional rift basins in southwestern Pangea …

Dinosaurs were remarkably successful during the Mesozoic and one subgroup, birds,
remain an important component of modern ecosystems. Although the extinction of non-avian …

Archosaurs have a 250 million year record that originated shortly after the Permian-Triassic
extinction event and is continued today by two extant clades, the crocodylians and the …

Abstract The Paraná Basin was filled by a sedimentary package deposited in successive
sedimentation episodes related to the tectonic events that hit the SW portion of the …

Tetanuran theropods represent the majority of Mesozoic predatory dinosaur diversity and
the lineage leading to extant Aves. Thus their history is relevant to understanding the …

Dinosauromorpha includes dinosaurs and other much less diverse dinosaur precursors of
Triassic age, such as lagerpetids [1]. Joint occurrences of these taxa with dinosaurs are rare …

Triassic beds from Argentina and Brazil provide the most relevant fossil record of early
dinosauriforms in terms of numerical abundance and taxonomic diversity. This record …

Ornithischia is a familiar and diverse clade of dinosaurs whose global phylogeny has
remained largely unaltered since early cladistic analyses in the mid 1980s. Current …

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 …

Crown group Archosauria, which includes birds, dinosaurs, crocodylomorphs, and several
extinct Mesozoic groups, is a primary division of the vertebrate tree of life. However, the …