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Article
Open AccessExceptional preservation and foot structure reveal ecological transitions and lifestyles of early theropod flyers
Morphology of keratinised toe pads and foot scales, hinging of foot joints and claw shape and size all inform the gras** ability, cursoriality and feeding mode of living birds. Presented here is morphologica...
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Article
Open AccessThe exquisitely preserved integument of Psittacosaurus and the scaly skin of ceratopsian dinosaurs
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 cover almost its entire body. Ne...
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Article
Open AccessOldest preserved umbilical scar reveals dinosaurs had ‘belly buttons’
In egg-laying amniotes, the develo** embryo is tethered to a number of the extraembryonic membranes including the yolk sac and allantois that deliver oxygen and nutrients and remove metabolic waste products ...
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Article
Open AccessNewly detected data from Haestasaurus and review of sauropod skin morphology suggests Early Jurassic origin of skin papillae
Discovered in 1852, the scaly skin belonging to Haestasaurus becklesii was the first to be described in any non-avian dinosaur. Accordingly, it has played a crucial role in the reconstruction of sauropod integume...
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Article
Open AccessNoasaurids are a component of the Australian ‘mid’-Cretaceous theropod fauna
The diversity of Australia’s theropod fauna from the ‘mid’-Cretaceous (Albian–Cenomanian) is distinctly biased towards the medium-sized megaraptorids, despite the preponderance of abelisauroids in the younger ...
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Article
Open AccessHigh-latitude neonate and perinate ornithopods from the mid-Cretaceous of southeastern Australia
Dinosaurs were remarkably climate-tolerant, thriving from equatorial to polar latitudes. High-paleolatitude eggshells and hatchling material from the Northern Hemisphere confirms that hadrosaurid ornithopods r...
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Article
Open AccessTooth loss and alveolar remodeling in Sinosaurus triassicus (Dinosauria: Theropoda) from the lower jurassic strata of the Lufeng Basin, China
Pathological or traumatic loss of teeth often results in the resorption and remodeling of the affected alveoli in mammals. However, instances of alveolar remodeling in reptiles are rare. A remodeled alveolus i...
