Yuzhoupliosaurus
Under construction
Category «Rhomaleosauridae»
Bishanopliosaurus
Under construction
Borealonectes
Under construction
Thaumatodracon
Thaumatodracon is a relatively large rhomaleosaurid from the Lower Jurassic (Sinemurian) of Lyme Bay – the coast between Lyme Regis and Charmouth – UK. The holotype specimen (NLMH 106.058) is an almost complete skull and cervical (neck) series.
Avalonnectes
Avalonnectes is a small-bodied basal rhomaleosaurid. Avalonnectes was named by Benson, Evans and Druckenmiller (2012) for a partial skeleton including the rear part of the skull from the lowermost Jurassic of Street, Somerset, UK. The specimen (NHMUK PV OR 14550) was previously referred to Thalassiodracon hawkinsii and is one of many historical plesiosaur skeletons preserved on slabs on display in the Natural History Museum, London.
Eurycleidus
Under construction
Rhomaleosauridae
All rhomaleosaurids have a relatively large head with a moderately long neck composed of about 28 vertebrae. The group has a stratigraphical range from the Lower Jurassic to the Middle Jurassic. The Rhomaleosauridae is traditionally regarded as a pliosauroid family but some phylogenies place the clade outside of Pliosauroidea in a sister relationship or unresolved polytomy with Pliosauroidea and Plesiosauroidea.
Maresaurus
M. coccai (Gasparini 1997) type material: MOZ 4386 V articulated skull and mandible, atlas-axis and first cervical vertebrae. From the upper part of the Los Molles Formation, Cuyo Group, Emileia giebeli and Emileia multiformis subzone.
Skull of Maresaurus in lateral, dorsal and ventral view.