Plesiosaurs were a diverse clade of marine reptiles that spanned nearly three-quarters of
the Mesozoic (earliest Jurassic to latest Cretaceous). They exhibit variation in head and …

Elasmosaurs were extremely long-necked, aquatic reptiles that used four flippers for
locomotion. Their distinctive long neck distinguishes them from all other Mesozoic forms, yet …

Elasmosaurs were a group of marine reptiles that lived during the Cretaceous period (about
145 million to 66 million years ago). They were fully adapted to an aquatic lifestyle, and had …

This paper investigates trends in the evolution of body size and shape in the Plesiosauria, a
diverse clade of Mesozoic marine reptiles. Using measures from well-preserved plesiosaur …

Plesiosauria is a diverse clade of marine reptiles that have been studied since the early 19th
century. However, phylogenetic relationships within the group have been contentious due to …

Thalattosuchians were highly specialised aquatic archosaurs of the Jurassic and Early
Cretaceous, and represent a peak of aquatic adaptation among crocodylomorphs. Relatively …

Secondary marine adaptation is a major pattern in amniote evolution, accompanied by
specific bone histological adaptations. In the aftermath of the end-Permian extinction …

Elasmosaurids are one of the most abundant fossil marine reptile groups identified from the
Upper Cretaceous strata of Antarctica. However, the documented record of intact …

The sauropterygian clade Plesiosauria arose in the Late Triassic and survived to the very
end of the Cretaceous. Plesiosauria evolved the greatest species diversity of any marine …

Publisher Summary This chapter presents comparative cranial anatomy of two North
American cretaceous Plesiosaurs. The skulls of Elasmosaurus morgani and …