Alexeyisaurus
Alexeyisaurus is the stratigraphically oldest named possible plesiosaur. It was named and described by Sennikov and Arkhangelsky (2010) as an elasmosaurid plesiosaur from the Late Triassic of Franz Josef Land, Russia. This would be highly unusual because the oldest definitive elasmosaurid plesiosaurs are otherwise restricted to the Cretaceous Period. The holotype material of…
Bobosaurus
Bobosaurus shares many characteristics with plesiosaurs and is one of a number of recently discovered derived sauropterygians that bridge the gap between basal sauropterygians and plesiosaurians. The name honours the person who found the skeleton, Mr Roberto "Bobo" Rigo (Dalla Vecchia 2006). Skeleton of Bobosaurus, preserved in situ. From Dalla Vecchia (2006)…