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The Rhamphorhynchoids are characterized
by their large skulls which make up over 50% of the overall
body size. The skull rests on a short neck consisting always
of seven vertebrae. The
skull contains numerous openings, but located between the
eye sockets, and nostril was a separate third opening. This
third opening may have helped in reducing the weight of the
large skull. The jaws of Rhamphorhynchoids always contain
teeth, ranging in number from ten to twenty. The shape of
the teeth varies from type to type indicating different
diets and feeding habits.
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