understand all the terminology? visit the Glossary)
the new Isle of Wight specimen is not as complete as the best Brazilian
specimens, it has a unique tooth configuration and represents an
entirely new kind of ornithocheirid. Caulkicephalus is known
from six pieces of skull, three of which fit together to form the
anterior of the rostrum. The rest being the braincase, a quadrate
and a jugal. There are also some postcranial elements - parts of
the first, second and third phalanges. No teeth were found.
of the rostrum vary in size, 1-4 and 8-10 being relatively large.
The third pair is the largest, followed by the second. The first
four pairs of large alveoli are followed by three very small alveoli
(5-7). Posterior to these are a further three large alveoli, and
after this point the specimen is broken. Alveoli 9 and 10 are staggered,
rather than parallel. Within alveoli 1 and 9 on the right side there
are replacement teeth emerging. The teeth are oval in cross-section.
The anterior tip of the palate curves gently upwards at alveoli
1 and 2, at an angle of around 45 degrees. The palate has several
foramina between the first four pairs of alveoli. They tend to be
paired, and linked by a 5-6mm long groove. There is a small pit
just posterior to the right alveolus that may be a nutritive foramen,
but could be a pathological feature or even more recent damage.
The maxillopremaxillary suture has a slightly posterior descent.
palatal ridge is not very pronounced, and is invisible in lateral
view, and becomes even less pronounced toward the anterior, disappearing
between alveoli 8 and 9.
has no premaxillary crest, but there is evidence that it has broken
off. There was a parietal crest at the posterior of the skull, but
much of this is missing, and consists of two thin sheets of compacta
separated by a system of fine trabeculae. These crests were not
is rare, so please report it if you find some...
do I know if I've found a bone?