Spitrasaurus
Under construction
Category «Plesiosauroidea»
Djupedalia
Under construction
Colymbosaurus
Colymbosaurus is a colymbosaurine (derived cryptoclidid) from the Late Jurassic of the UK and Svalbard, Norway. Two valid species are known, C. megadeirus from the UK, and C. svalbardensis from Svalbard, Norway. Benson and Bowdler (2014) revised the genus Colymbosaurus and summarised its complicated history:
“Seeley (1869) (p.97-101) listed two partial postcranial skeletons from the Kimmeridge Clay Formation of Ely…and Haddenham… in Cambridgeshire as belonging to a new species, Plesiosaurus megadeirus Seeley 1869. P.
Vinialesaurus
Under construction
Tatenectes
Under construction
Pantosaurus
Under construction
Muraenosaurus
Under construction
Restoration of the skeleton of Muraenosaurus in lateral view. From Andrews 1910.
Posterior cervical (neck) vertebra of Muraenosaurus in lateral and posterior view. From Andrews (1910).
Dorsal vertebra of Muraenosaurus in anterior view.
Lusonectes
Lusonectes is a poorly known microcleidid the Toarcian (Lower Jurassic) of Portugal. It is known from a single holotype specimen (MG33), a partial skull in the Museu Geológico, Lisbon, Portugal. It was described and named by Smith et al.