Pessosaurus is an extinct genus of ichthyosaurs which existed during the Middle Triassic period.

There are two species:Wiman. C. (1910) Ichthyosaurs from the Triassic Spitzbergens [in Swedish]. Bulletin of the Geological Institution of the University of Upsala 10: 125–148. Pessosaurus polaris Hulke, 1873 Pessosaurus suevicus Huene, 1916

See also List of ichthyosaurs Timeline of ichthyosaur research

References