Dinosaurs diversified in two steps during the Triassic. They originated about 245 Ma, during
the recovery from the Permian-Triassic mass extinction, and then remained insignificant until …

Triassic caves in south-west Britain contain a unique and diverse fauna of terrestrial
vertebrates, but their age is disputed since none of these taxa are known from surface strata …

Acrodont dental implantation is widely considered an important character for referring fossil
material to Rhynchocephalia. Under its purest definition, acrodonty involves teeth being …

The historical clade “Protorosauria” represents an important group of archosauromorph
reptiles that had a wide geographic distribution between the Late Permian and Late …

We describe a new small-bodied coelophysoid theropod dinosaur, Pendraig milnerae gen.
et sp. nov, from the Late Triassic fissure fill deposits of Pant-y-ffynnon in southern Wales. The …

The acquisition of the load-bearing dentary–squamosal jaw joint was a key step in
mammalian evolution,,,–. Although this innovation has received decades of study, questions …

Mammals, birds, and squamates (lizards, snakes, and relatives) are key living vertebrates,
and thus understanding their evolution underpins important questions in biodiversity …

Crocodylomorpha is the stem-lineage of modern crocodylians and the only pseudosuchian
(ie crocodylian-line archosaurs) clade that survived the Triassic–Jurassic mass extinction …

Despite considerable advances in knowledge of the anatomy, ecology and evolution of early
mammals, far less is known about their physiology. Evidence is contradictory concerning the …

The earliest crocodylomorphs, known as non‐crocodyliform crocodylomorphs, first appeared
during the Late Triassic. In contrast to extant crocodylians, which are all semi‐aquatic, early …