This taxon is considered subjective synonym of
of the valid taxon Nothosaurus giganteus
according to the Paleobiology Database.
See the page for Nothosaurus giganteus →
Bibliography
Original description
O. Rieppel. 1994. Osteology of Simosaurus gaillardoti and the relationships of stem-group Sauropterygia. Fieldiana: Geology, new series 28:1-85
DOI ↗