Genus: Hypsilophodon HUXLEY, 1869
Etymology: Hypsilophus, an old name for a type of iguana with a high (hyps) crest (lophos) along its back and Greek, odon, "tooth." Hypsilophus tooth.

Species: foxii HUXLEY, 1869
Etymology: In honor of William Fox.
= Hypsilophodon foxi (HUXLEY, 1869) HUXLEY, 1870
= Iguanodon foxi (HUXLEY, 1869) OWEN, 1873

Holotype: BMNH R197

Locality: 210 yards east of Barnes High, Isle of Wight County, England, Southern United Kingdom.

Horizon: Hypsilophodon bed (top of the Wessex Formation), Wealden Group.

Biostratigraphy:

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

Material: Skull, partial atlas, a cervical vertebra and a dorsal centrum of a small individual.

Paratype: BMNH 28707, 39460-1

Locality: Found in a cliff about 100 yards west of Cowleaze Chine, Isle of Wight, England.

Horizon: Wessex Formation, Wealden Group.

Biostratigraphy:

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

Material: An articulated skeleton consisting of a partial vertebral column, pelvic region and hind limbs.

 

Referred material:

BMNH R170: Distal end of left tibia, 2 proximal and 2 distal ends of femora, distal end of a humerus and a distal end of a third metatarsal.
Note: LYDEKKER in 1888 lists this under Hypsilophodon foxi as a proximal half of a right tibia, p. 194. Iguanodon.

BMNH R2466-R2476: Parts of one small individual in soft grey marl.

 

Locality: Near Cowleaze Chine, 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:

BMNH R2481: 12 centra and 1 complete cervical vertebra.

BMNH R5829: Nearly complete mounted skeleton of a large individual: bones slightly crushed.

BMNH R5830: Nearly complete mounted skeleton of a juvenile.

BMNH R5862: Left maxilla.

BMNH R5863: Part of left mandible.

BMNH R6372: Intercentrum of atlas.

BMNH R8352: Distal part of large right femur with fourth trochanter.

Museum of Geology of the Isle of Wight, Sandown, Isle of Wight; Poole Collection: Part of tail and hind-limb.

 


Locality: Found on a beach between Barnes High and Cowleaze Chine after it had been rolling about for some time, 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:

BMNH R2477: Block which contained a skull with atlas and axis, dermal amour and two vertebral series (a,b) each consisting of the posterior dorsals and the anterior sacrals.

 


Locality: Barnes High, 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:

BMNH R189: Part of right mandible.
Note: 210 yd east of Barnes High.

BMNH R190: Right mandibular ramus, 2 caudal vertebrae and parts of ribs.
Note: 150 yd east of Barnes High.

BMNH R191: Tooth from R190.

 

Locality: Hypsilophodon Bed, about 100 meters west of Cowleaze Chine and rises in the cliff to end about 2/3 miles further west just beyond Barnes High, 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:

BMNH R192: Block with articulated bones of pectoral girdle, forelimbs, neck and jaws with various disarticulated skull bones of a large individual. Also other blocks with parts of pelvis and hind limbs, all the bones are poorly preserved.

BMNH R192a: Large left femur that does not belong to the same individual as R192.

BMNH R192b: Ilium and prepubic process from an extremely young individual.

BMNH R193: Block with articulated bones of pelvis, hindlimb and tail.

BMNH R194: Block with skull elements, right humerus and radius.
Note: LYDEKKER 1888 incorrectly listed as 'an imperfect pelvis and bones of the hind limb'.

BMNH R195: Block with pelvic region.

BMNH R196, R196a: Two blocks which together contained a practically complete articulated skeleton (R196) plus the posterior half of a tail from a larger individual.

BMNH R199: Left tibia of a large individual.
Note: Listed as a right by LYDEKKER (1888) but later corrected (1891).

BMNH R200: Left and right hind-feet of large animal(s).

BMNH R202a: Imperfect dorsal vertebra.

BMNH R732: Right tibia.
Note: Listed by LYDEKKER (1888) as a left tibia but later (1891) corrected.

BMNH R8422: Sacral centra 1-3 of a large individual.

BMNH R8366: Many isolated bones from at least two individuals, one small and the other medium-sized.

BMNH R8418: Skull elements and teeth.

Department of Zoology, University College of London: Vertebrae and limb bones from at least 3 small animals.

NAISH & MARTILL, 2001a

MIWG 5192: Fragmentary skull, dentary, and fragmentary skeleton.

MIWG 6362: Fragmentary skull, dentary.

= Valdosaurus canaliculatus BLOWS, 1996

NHM R12440: Proximal right femur.

 


Locality: Unknown, 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:

BMNH R8367: Isolated skull bones.

BMNH R8419: Right exoccipital and paroccipital process.

 

HUTT, 2001

Locality: Brighstone 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:

MIWG 4127: Partial skeleton.

MIWG 5123: Partial skeleton.

MIWG 5127: Distal left scapula.

MIWG 5138: Metatarsal.

MIWG 5139: Right tibia.

MIWG 5147: Proximal left ischium.

MIWG 5174: Distal tibia.

MIWG 5180: Distal right femur.

MIWG 5191: Partial skeleton.

MIWG 5192: Partial skeleton.

MIWG 5284: Partial skeleton.

MIWG 5313: Partial skeleton.

MIWG 5391: Left humerus.

MIWG 5828: Partial skeleton.

MIWG 6362: Skull and partial skeleton.

MIWG 6418: Left distal femur.

MIWG 6877a: Juvenile.

MIWG 6877b: Adult.

MIWG 6977: Near complete skeleton.

MIWG 7291: Osteo, thin section.

IWCMS 1994.52: Metatarsal.

 

Locality: Brook 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:

MIWG 6442: Metatarsal.

MIWG 6526: Left hind limb.

MIWG 6683: Partial skeleton.

 

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

Horizon:

Biostratigraphy:

Age: Early Cretaceous.

Material:

MIWG 6626: Skin.

MIWG 6621: Caudal vertebra.

 

 LOCKWOOD, MARTILL, PEAKER, & SHEARS-OZEKI, 2016

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

Horizon: Wessex Formation.

Biostratigraphy:

Age: Barremian Stage, Lower Gallic Subepoch, Early Cretaceous Epoch, Early Cretaceous.

Material:

Number; Not given: Fragmentary skeleton. Note with subcircular tunels under the skeleton, leaving a trail of bone chips made by ossiphagous beetles.