Species: rostratus (OWEN, 1865) NOVOZHILOV, 1964
Etymology: Latin, rostris, rostralis, rostrum, "beak, snout."
= Plesiosaurus rostratus OWEN, 1865
Holotype: BMNH 38525
Locality: Lyme Regis coast, Pinhay Bay- Charmouth, (SY 3291-SY 3794), Dorset County, England, Southern United Kingdom.
Horizon: Lower Lias.
Biostratigraphy: Arietites bucklandii zone.
Age: Lower Sinemurian Stage, Lower Lias Epoch, Early Early Jurassic.
Material: Skull and skeleton.
Referred material:
BROWNE, 1894
Locality: Aust Cliff, Avon (ST 565895-ST 572901, Bristol, Gloucestershire County, England, Southern United Kingdom.
Horizon: Westbury Formation, ‘Rhaetic bone bed’.
Biostratigraphy:
Age: Rhaetian Stage, Uppermost Late Triassic Epoch, Late Triassic.
Material:
Number: Not given: Teeth.