The ascendancy of dinosaurs on land near the close of the Triassic now appears to have
been as accidental and opportunistic as their demise and replacement by therian mammals …

The Ankylosauria is a group of herbivorous, quadrupedal, armoured dinosaurs subdivided
into at least two major clades, the Ankylosauridae and the Nodosauridae. The most derived …

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 …

As the supercontinent Pangaea fragmented during the Mesozoic era, dinosaur faunas were
divided into isolated populations living on separate continents. It has been predicted …

Ankylosauria is a diverse clade of quadrupedal ornithischian dinosaurs whose remains are
known from Middle Jurassic to latest Cretaceous sediments worldwide. Despite a long …

Protohadros byrdi, gen. et sp. nov., from the Cenomanian Woodbine Formation, Texas, is
described on the basis of a disarticulated skull and isolated postcrania. The possession of …

The sutures of the skulls of vertebrates are generally open early in life and slowly close as
maturity is attained. The assumption that all vertebrates follow this pattern of progressive …

ABSTRACT The upper Cedar Mountain Formation, Emery Coun-ty, Utah, has yielded a rich
vertebrate fauna including nearly 80 taxa of Chondrichthyes, Osteichthyes, Lissamphibia …

The armoured dinosaurs (Thyreophora) were a significant component of Mesozoic terrestrial
ecosystems, appearing in the earliest Jurassic and surviving until the latest Cretaceous, and …

The discovery of numerous bones and armor of a new genus of ankylosaur closely related to
the British Polacanthus Owen in the Yellow Cat Member of the Cedar Mountain Formation of …