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Liaoxipterus (Pterosauria) hyoid apparatus (free pdf)
A recent paper not yet mentioned:
Lü Jun-chang (2015)
The Hyoid Apparatus of Liaoxipterus Brachycephalus (Pterosauria) and
Its Implications for Food-catching Behavior.
Acta Geoscientica Sinica 36(3):362-366
The feeding behavior of pterosaurs was varied in different groups.
Judging by the tooth morphologies and fossilized stomach contents of
pterosaurs, the feeding habits included fish-eating, insect-eating,
filtering small aquatic organisms, eating shelled crabs and snails,
and fruit-eating. Because of the need for survival, they occupied
different ecological niches, which determined their different food
sources. Herein described is an almost complete, well-preserved hyoid
apparatus of Liaoxipterus brachyognathus in comparison with the hyoid
apparatus of the modern lizard Chameleon. The long processus lingualis
(processus entoglossus) is similar to that of the modern lizard
Chameleon, which captures prey by tongue, implying that Liaoxipterus
might share a similar lingual feeding behavior. This phenomenon, plus
its special tooth morphology, further suggests that it was an
insect-eating rather than fish-eating pterosaur.