Morphology forms the most fundamental level of data in vertebrate palaeontology because it
is through interpretations of morphology that taxa are identified, creating the basis for broad …

The history of life is often viewed by biologists and palaeontologists as illustrating the
progressive nature of evolution. and this is an important element in explanations of major …

The early evolution of archosauromorphs during the Permo-Triassic constitutes an excellent
empirical case study to shed light on evolutionary radiations in deep time and the timing and …

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 …

The Archosauria include the living crocodilians and birds, as well as the fossil dinosaurs,
pterosaurs, and basal'thecodontians'. Cladograms of the basal archosaurs and of the …

The vertebrae of sauropods are characterized by numerous bony struts that connect the
costovertebral and intervertebral articulations, centrum, and neural spine of the presacral …

The most commonly cited apomorphy of Archosauriformes is an opening in the snout known
as the antorbital cavity. Despite the ubiquity and prominence of the antorbital cavity, its …

Archosaurs first appeared in the Middle Triassic and within a short interval of time came to
dominate all faunas of large vertebrates for the remainder of the Mesozoic. It is widely held …

Background The axial skeleton of extinct saurischian dinosaurs (ie, theropods,
sauropodomorphs), like living birds, was pneumatized by epithelial outpocketings of the …

The Triassic period documents the origin and diversification of modern amniote lineages
and the Late Triassic fossil record of South America has been crucial to shed light on these …