Speces: valdensis LYDEKKER, 1889 (nomen dubium)
Etymology:
Note: Referred to Hypsilophodon foxi by LYDEKKER, 1888

Holotype: NHM (BMNH) R167

Locality: Near Cowleaze Chine, Isle of Wight County, England, Southern United Kingdom.

Horizon: Hypsilophodon bed, Wessex Formation, Wealden Group.

Biostratigraphy:

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

Material: Left femur.

Referred material:

= Camptosaurus? valdensis GILMORE, 1909

Locality: Isle of Wight County, England, Southern United Kingdom.

Horizon: Possibly Wessex Formation, Wealden Group.

Biostratigraphy:

Age: Early Cretaceous.

Material:

NHM R1412: Axis and atlas intercentrum.