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Dsungaripterus has no teeth! What you are seeing are blunt bony projections
on the margins of the toothless jaw. Most sources (eg. Wellnhofer's
Encyclopedia) depict D. as a shellfish eater, using the upturned,
tweezer-like jaws to probe for shelled food-items which were then cracked
open by the bony-knobs.
I had fun with the idea of a cancrivorous pterosaur when I hastily did the
> Sorry about the doubt I have not to be about dinosaurs, but just
>occurred to me... the head of _Dsungaripterus_ (a pterosaur) has some
>strange features, like the small crest over its head and a small spike
>pointed backward on the back of the head. But what really bothered me was
>his 'beak' (if it can be called so...) some teeth on the back half of the
>jaws, and on the front half, just a strange 'beak' curved upside... So,
>what may have been the function of this 'beak' and his diet?