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 …

ABSTRACT A detailed osteological description of Tyrannosaurus rex Osborn, 1905 is
presented, based primarily on the most complete specimen yet collected of this taxon …

Isolated theropod teeth are some of the most common fossils in the dinosaur fossil record
and are continually reported in the literature. Recently developed quantitative methods have …

A new species of tyrannosaurid from the upper Two Medicine Formation of Montana
supports the presence of a Laramidian anagenetic (ancestor-descendant) lineage of Late …

Tyrannosauroids—the group of carnivores including Tyrannosaurs rex—are some of the
most familiar dinosaurs of all. A surge of recent discoveries has helped clarify some aspects …

The Late Cretaceous (∼ 95–66 million years ago) western North American landmass of
Laramidia displayed heightened non-marine vertebrate diversity and intracontinental …

Although among the first theropod dinosaurs known to science, and an iconic taxon in the
history of dinosaur paleontology, the large carnivore Dryptosaurus aquilunguis from the Late …

In amniotes, the predominant developmental strategy underlying body size evolution is
thought to be adjustments to the rate of growth rather than its duration. However, most …

The defining masterwork on the evolution of reptiles. Over 300 million years ago, an early
land vertebrate developed an egg that contained the embryo in an amnion, allowing it to be …

The Lourinhã Formation (Kimmeridgian-Tithonian) of Central West Portugal is well known
for its diversified dinosaur fauna similar to that of the Morrison Formation of North America; …