Click Here to Return to the Main Page 


Iguanodon skeleton
Iguanodon bernissartensis by S. M. Clabby
Iguanodon tooth
Iguanodon teeth
Iguanodon Jaw
Iguanodon dentary
Iguanodon Skull
Iguanodon Caudal vertebra
Iguanodon pelvis
Iguanodon vertebrae
Iguanodon haemal arch


Iguana Tooth
10 m (32 feet)

Iguanodontidae Cope, 1869

Iguanodon bernissartensis Boulenger, in Beneden, 1881

Wessex and Vectis Formations
Iguanodon was a herbivorous dinosaur, feeding on the plants, such as conifers, cycads and tree-ferns that are found in the Wessex Formation. Iguanodon were capable of walking on four legs or two, with I. bernissartensis prefering quadrupedalism. There are large spikes on the thumbs, which may have been used for defense, but there is possible evidence for intraspecies fighting, with the spikes being used on competitors for mates.
(More info can be found at DinoWight Palaeoecology)
Iguanodon can be found almost anywhere the Wealden group is exposed. The best bet is to look in the plant debris beds, which are usually light grey, with bits of black lignite in them.

Description of Material

(Don't understand all the terminology? visit the Glossary)

As one of the most common dinosaurs in the Wealden, let alone the Isle of Wight, there is quite a lot of this. The distinguishing features of Iguanodon are in the skull, pelvis and foot, so most material is assumed to be Iguanodon just because it's so common. The teeth can reach up to 40 mm (1 inches) in height, and show an expanded crown and fine denticulation. The teeth of different jaws have different wear marks. On the upper jaw there is a prominent keel in the labial (outer) surface, where as in the lower jaw the teeth have two less prominent ridges on the lingual (inner) surface.

The skull is deep and robust with a laterally compressed snout, with the premaxillae and predentary forming a spoon-shaped beak with serrated margins. The quadrate is pillar-like. There were prominent palpebrals, and secondary palpebrals behind them, which is possibly unique to I. bernissartensis. The hands are large and robust, with an elongate conical thumb-spike. The phalanges of the second, third and forth fingers are shortened, with hooves on digits two and three.The forearms are 50-75% the length of its hindlimbs. The foot is tridactyl , with no hallux or fifth digit, and examples of their footprints can be seen at Hanover point. The vertebrae have short neural arches.

Iguanodon skin has also been found, which has a rough pebble-like texture.

Until 2006, there were believed to be two species of Iguanodon found on the Isle of Wight, I. bernissartensis and I. atherfieldensis. I. atherfieldensis has since been removed from the genus Iguanodon and so has been renamed Mantellisaurus atherfieldensis, which can be found HERE

How do I know if I've found a bone?

Further Information.
Dinosaur Isle - Iguanodon
Quilong (This website has scans from a Japanese magazine featuring images from Norman 1980)
References (not cited above)
Naish and Martill, 2001a setstats 1