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
E. Koken. 1887. Die Dinosaurier, Crocodiliden und Sauropterygier des Norddeutschen Wealden [The dinosaurs, crocodilians, and sauropterygians of the north German Wealden]. Palaeontologische Abhandlungen 3(5):1-111