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

Patagonia has yielded the most comprehensive fossil record of Cretaceous theropods from
Gondwana, consisting of 31 nominal species belonging to singleton taxa and six families …

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 …

In post-Cambrian time, five events-the end-Ordovician, end-Frasnian in the Late Devonian,
end-Permian, end-Triassic, and end-Cretaceous-are commonly grouped as the “big five” …

Titanosauriforms represent a diverse and globally distributed clade of neosauropod
dinosaurs, but their inter-relationships remain poorly understood. Here we redescribe …

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

Until relatively recently, information on the internal skull structures of fossil taxa relied on
fortuitous breaks, aggressive removal of rock matrix (Galton 1989, 2001), sectioning with a …

Abstract The Late Cretaceous was a time of tremendous global change, as the final stages
of the Age of Dinosaurs were shaped by climate and sea level fluctuations and witness to …

Abstract The Late Jurassic Tendaguru Formation of Tanzania, southeastern Africa, records a
rich sauropod fauna, including the diplodocoids Dicraeosaurus and Tornieria, and the …

Ornithischians form a large clade of globally distributed Mesozoic dinosaurs, and represent
one of their three major radiations. Throughout their evolutionary history, exceeding 134 …