Genus: Ornithopsis SEELEY, 1870
Etymology: Greek, ornis, "bird" and Greek, opsis, "likeness, appearance."
= Ornithopsis SAUVAGE, 1897/8 (sic)
= Ornithopsis SAUVAGE, 1897/8 (sic)
= Ornithopsis SEELEY, 1870 (nomen dubium)

Species: hulkei SEELEY, 1870 (nomen dubium)
Etymology: John Whittaker Hulke (1830 - 1895), renowned British palaeoherpetologist of the 19th century.
= Pelorosaurus hulkei (SEELEY, 1870) KUHN, 1939 (nomen dubium)
= referred to Hoplosaurus armatus by LYDEKKER, 1893

Lectotype: NHMUK (old BMNH) 28632

Locality: Near Barne's Chine, South Coast, Isle of Wight County, England, Southern United Kingdom.

Horizon: Wessex Formation, Wealden Group.

Biostratigraphy:

Age: Valanginian-Hauterivian Stage, Neocomian Subepoch- Barremian Stage, Lower Gallic Subepoch, Early Cretaceous Epoch, Early Cretaceous.

Material: Imperfect centrum of anterior dorsal vertebra.

Referred material:

= Bothriospondylus magnus OWEN, 1875 (nomen dubium)
Etymology: Latin, magnus, "large."
= Chondrosteosaurus magnus (OWEN, 1875) OWEN, 1976 (nomen dubium)

Holotype: NHMUK R (old BMNH) 2239

Locality: Hastings, (TQ 831095-TQ 853105), East Sussex County, England, Southern United Kingdom.

Horizon: Hastings Beds, (Ashdown Beds, Tunbridge Wells Sand).

Biostratigraphy:

Age: Berriasian-Valanginian Stage, Neocomian Subepoch, Early Cretaceous Epoch, Early Cretaceous.

Material: Fragmentary dorsal vertebra.