Under construction
Category «Plesiosauroidea»
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.
Microcleidus
Microcleidus is a medium (4.27 m) to large (5.03 m) plesiosauroid with a small head and a long neck containing 38–39 cervical vertebrae.
Watson (1909) erected Microcleidus to accommodate fossil material belonging to ‘P.’ homalospondylus and ‘P.’ macropterus (Watson 1911).
Plesiopterys
Westphaliasaurus
Under construction
Skeleton of Westphaliasaurus. The central slab of the skeleton was awaiting preparation at the time of this photograph, but was subsequently prepared. From Schwermann & Sander (2011).
Styxosaurus
The holotype specimen (KUVP 1301) of Styxosaurus is an articulated skull and anterior portion of the neck. It was found in the Niobrara Chalk near Hell Creek, Logan County, Western Kansas in 1890. It was described later that year as a new species Cimoliosaurus snowii by Williston (1890a) (and Williston 1890b), who subsequently (Williston 1906) referred the species to Elasmosaurus.
‘Ogmodirus’
The type skeleton of ‘Ogmodirus’ was collected in 1909 by C. Boyce from the upper Greenhorn Limestone Formation (Lower Turonian, Late Cretaceous) of Cloud County (near Aurora), Kansas (Storrs 1999, Schumacher and Everhart 2005). The specimen, KUVP 441, is a partial skeleton consisting of partial vertebral column (51 cervical vertebrae, 18 caudal vertebrae), limb, and girdle elements.