Fieldwork in the Early Cretaceous Jehol Group, northeastern China has revealed a plethora
of extraordinarily well-preserved fossils that are shaping some of the most contentious …

Information on Late Triassic dinosaurs in North America (33 locations, an increase of about
70%) comes to us primarily through the work of EH Colbert on the faunas of the southwestern …

For 130 years, dinosaurs have been divided into two distinct clades—Ornithischia and
Saurischia. Here we present a hypothesis for the phylogenetic relationships of the major …

Non‐avian dinosaurs went extinct 66 million years ago, geologically coincident with the impact
of a large bolide (comet or asteroid) during an interval of massive volcanic eruptions and …

Objective —To compare intraocular pressure (IOP) measurements obtained with a rebound
tonometer in dogs and horses with values obtained by means of applanation tonometry and …

Palaeobiodiversity analysis underpins macroevolutionary investigations, allowing identification
of mass extinctions and adaptive radiations. However, recent large-scale studies on …

The development of distinct regions in the amniote vertebral column results from somite
formation and Hox gene expression, with the adult morphology displaying remarkable variation …

Pterosaurs first appeared in the Late Triassic and persisted until the terminal Cretaceous:
they achieved a global distribution during the Mesozoic. Here, we attempt to provide the first …

The accurate reconstruction of palaeobiodiversity patterns is central to a detailed understanding
of the macroevolutionary history of a group of organisms. However, there is increasing …

The relationship between dinosaurs and other reptiles is well established 1 , 2 , 3 , 4 , but
the sequence of acquisition of dinosaurian features has been obscured by the scarcity of …