For most dinosaurs, clutches consisted of a single layer of spherical to sub-spherical, highly
porous eggs that were probably fully buried. Both eggs and clutch form change drastically …

All modern mammals are descendants of the paraphyletic non-mammaliaform Synapsida,
colloquially referred to as the “mammal-like reptiles.” It has long been assumed that these …

The richest and most diverse assemblage of early terrestrial tetrapods is preserved within
the infilled cave system of Richards Spur, Oklahoma (289–286 Mya 1). Some of the oldest …

Morphology of keratinised toe pads and foot scales, hinging of foot joints and claw shape
and size all inform the grasping ability, cursoriality and feeding mode of living birds …

Understanding the evolution of the earliest avemetatarsalian (bird-line) archosaurs and
inferring the morphology of the last common ancestor of Archosauria are hampered by a …

The Frankfurt specimen of the early-branching ceratopsian dinosaur Psittacosaurus is
remarkable for the exquisite preservation of squamous (scaly) skin and other soft tissues that …

Fossil feathers have transformed our understanding of integumentary evolution in
vertebrates. The evolution of feathers is associated with novel skin ultrastructures, but the …

We present the pelvic and hindlimb musculature of the abelisaurid Skorpiovenator
bustingorryi, constituting the most comprehensive muscle reconstruction to date in …

The interrelationships of the three major dinosaur clades (Theropoda, Sauropodomorpha,
and Ornithischia) have come under increased scrutiny following the recovery of conflicting …

Dinosaur tracks are considerably common in the fossil record and were described from
many areas in the world. They provide a live picture of dinosaur behaviour and offer …