Genus: Oplosaurus GERVAIS, 1852 (nomen dubium)
Etymology: Greek, hoplon, “weapon, shield” and Greek, sauros, “lizard”: “Armored lizard.”
= Hoplosaurus LYDEKKER, 1890 (sic)

Species: armatus GERVAIS, 1852 (nomen dubium)
Etymology: Latin, armatura, "arms, equipment."
= Hoplosaurus armatus (GERVAIS, 1852) SWINTON, 1936 (nomen dubium)
= Oplosaurus arcuatus GERVAIS, 1859 (sic)
= Onchosaurus armatus GERVAIS, 1859 (sic)
= Ornithopsis hulkei SEELEY, 1870 (nomen dubium) (Referred material)

Holotype: NHMUK (old BMNH) R964

Locality: Brixton Bay, 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: Tooth.

Referred material:

Cf. Oplosaurus armatus GARCIA-COBENA, SANCHEZ-FENOLLOSA, CABRERA-ARGUDO & COBOS, 2026

Locality: CT46 fossil site, El Castellar Municipality, Eastern Iberian Range, Maestrazgo Basin, Penagolosa sub-basins, Teruel Province, Spain.

Horizon: El Castellar Formation.

Biostratigraphy:

Age: Upper Hauterivian Stage, Late Neocomanian Subepoch, Early Cretaceous Epoch, Early Cretaceous-Barremian Stage, Early Gallic Subepoch, Middle Early Cretaceous Epoch, Early Cretaceous.

Material:

MAP-8387: Tooth crown fragment.

 

GARCIA-COBENA, VERDU & COBOS, 2024

Locality: Penagolosa sub-basin, municipality of El Castellar, Teruel Province, Spain.

Horizon: El Castellar Formation.

Biostratigraphy:

Age: Late Hauterivian Stage, Upper Neocomian Subepoch, Lower Early Cretaceous Epoch-Early Barremian Stage, Lowermost Gallic Subepoch, Middle Early Cretaceous.

Material:

CPT-678: Tooth.

 

LYDEKKER, 1892

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:

NHMUK R (old BMNH) 986: A terminal phalange of the pes.

 

LYDEKKER, 1893

Locality: 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:

NHMUK (old BMNH) : Dorsal vertebra.

 

NAISH & MARTILL, 2001d

Locality: Culver (= Yaverland), 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:

NHMUK (old BMNH) R1010: Posterior dorsal vertebra.
Note: Was referred to Iguanodon bernissartensis LYDEKKER, 1888