This taxon is considered nomen vanum, species not entered
of the valid taxon Plesiosauria
according to the Paleobiology Database.
See the page for Plesiosauria →
Bibliography
Original description
R. Owen. 1864. Monograph on the fossil Reptilia of the Cretaceous formations. Supplement no. IV. Sauropterygia (Plesiosaurus). Palaeontographical Society Monographs 16(70):1-18