Iguanodontidae Cope, 1869
bernissartensis Boulenger, in Beneden, 1881
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.
info can be found at DinoWight Palaeoecology)
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 (1½ 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)
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.
skin has also been found, which has a rough pebble-like texture.
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
do I know if I've found a bone?