Therizinosauroids are an enigmatic group of dinosaurs known mostly from the Cretaceous
period of Asia, whose derived members are characterized by elongate necks, laterally …

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 …

A partial skeleton of a primitive bird, Rahona ostromi, gen. et sp. nov., has been discovered
from the Late Cretaceous of Madagascar. This specimen, although exhibiting avian features …

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 …

Recent fieldwork in the Upper Cretaceous (Maastrichtian) Maevarano Formation, northwest
Madagascar, has yielded important new skull material of the abelisaurid theropod …

We describe the osteology of the new small theropod dinosaur Masiakasaurus knopfleri,
from the Late Cretaceous Maevarano Formation of northwestern Madagascar …

Recent discoveries of fossil vertebrates from the Late Cretaceous of Madagascar include
several specimens of a large theropod dinosaur. One specimen includes a nearly complete …

Background During much of the Late Cretaceous, a shallow, epeiric sea divided North
America into eastern and western landmasses. The western landmass, known as Laramidia …

Centrosaurine ceratopsians are characterized by well developed nasal horncores or
bosses, relatively abbreviated supraorbital horncores or bosses, and adorned …

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