Named By: V. M. Efimov - 1999.
Synonyms: Ophthalmosaurus gorodischensis.
Classification: Chordata, Reptilia, Ichthyosauria, Ophthalmosauridae, Platypterygiinae.
Species: U. gorodischensis (type).
Known locations: Russia.
Time period: Tithonian of the Jurassic.
Fossil representation: Partial skull and post cranial skeletal remains.
Undorosaurus is a genus of ichthyosaur which lived in the late Jurassic seas of what is now Russia. For a time Undorosaurus was speculated to be synonymous with Ophthalmosaurus, but today Undorosaurus is regarded by all to be a distinct genus, though one that is related to Ophthalmosaurus.
- A new family of Ichthyosaurs, the Undorosauridae fam. nov. from the Volgian stage of the European part of Russia. - Paleontological Journal 33(2):174-181. - V. M. Efimov - 1999.
- On a new ichthyosaur of the genus Undurosaurus. - Proceedings of the Zoological Institute RAS 318(5):187-196. - M. S. Arkhangelsky & N. G. Zverkov - 2014.