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A reappraisal of the morphology and systematic position of the theropod dinosaur Sigilmassasaurus from the “middle” Cretaceous of Morocco

Based on the new remains, a re-evaluation of the original materials, and comparisons with other spinosaurids, the holotype of Sigilmassasaurus brevicollis is identified as an anterior dorsal, rather than a cervical vertebra, and differences between elements referred to this taxon can be explained by different positions of the elements in question within the vertebral column.
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Evolution of the Sauropterygian Labyrinth with Increasingly Pelagic Lifestyles

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Enigmatic dinosaur precursors bridge the gap to the origin of Pterosauria

It is demonstrated that lagerpetids—a group of cursorial, non-volant dinosaur precursors—are the sister group of pterosaurs, sharing numerous synapomorphies across the entire skeleton, substantially shortening the temporal and morphological gap between the oldest pterosaurus and their closest relatives and simultaneously strengthens the evidence that pter dinosaurs belong to the avian line of archosaurs.
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Anatomy of Rhinochelys pulchriceps (Protostegidae) and marine adaptation during the early evolution of chelonioids

A phylogeny of turtles with increased chelonioid taxon sampling and revised postcranial characters is provided, recovering protostegids as stem-chelonioids, which imply a mid Early Cretaceous origin of total-group chelonIOids and an early Late Cret Jurassic age for crown-chelanioids.
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A review of the carotid artery and facial nerve canal systems in extant turtles

New insights are provided regarding the carotid circulation and facial nerve innervation systems in a broad set of extant turtles using CT (computed tomography) scans, which allow us to trace the canals these structures form in bone and understand the interaction between both systems.
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A small podocnemidoid (Pleurodira, Pelomedusoides) from the Late Cretaceous of Brazil, and the innervation and carotid circulation of side‐necked turtles

The neuroanatomy of side‐necked turtles with the aid of micro‐computed tomography of specimens of the main pleurodiran lineages is explored, light is shed on the different carotid circulation patterns in pleurodires, and new phylogenetic characters are proposed to describe the Neuroanatomical variation of the group.
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A new phylogenetic hypothesis of turtles with implications for the timing and number of evolutionary transitions to marine lifestyles in the group

A new phylogenetic hypothesis informed by high resolution computed tomographic data of living and fossil taxa is presented, indicating three independent evolutionary transitions to marine life in non‐pleurodiran turtles (plus an additional two‐three in pleurodires).
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How should we estimate diversity in the fossil record? Testing richness estimators using sampling‐standardised discovery curves

To infer genuine patterns of biodiversity change in the fossil record, we must be able to accurately estimate relative differences in numbers of taxa (richness) despite considerable variation in…
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New insights into the lifestyle of Allosaurus (Dinosauria: Theropoda) based on another specimen with multiple pathologies

The occurrence of multiple lesions interpreted as traumatic pathologies again underlines that large-bodied theropods experienced frequent injuries during life, indicating an active predatory lifestyle, and their survival perhaps supports a gregarious behavior for Allosaurus.
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A re-description of Sandownia harrisi (Testudinata: Sandownidae) from the Aptian of the Isle of Wight based on computed tomography scans

A detailed study of the cranial and mandibular anatomy of Sandownia harrisi from the Aptian of the Isle of Wight is provided, which confirms a high number of anatomical similarities with thalassochelydians and particularly Solnhofia parsonsi, which is interpreted as an early member of the sandownid lineage.
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