Genus: Haematosaurus SAUVAGE, 1874 (nomen dubium)
Etymology:

Species: lanceolatus SAUVAGE, 1874 (nomen dubium)
Etymology:
= Plesiosaurus lanceolatus (SAUVAGE, 1874) KUHN, 1934 (nomen dubium)

Holotype:

Locality: Chatillon, France.

Horizon:

Biostratigraphy: Aulacostephanus pseudomutabilis zone.

Age: Kimmeridgian Stage, Middle Malm Epoch, Late Jurassic.

Material: Teeth.