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Description
Well, really, there's nothing truly "swan-beaked" about Cycnorhamphus, despite that being the name's meaning. Given the gentle curvature of the snout, the long neck, and the long legs, one is more inclined to plovers and sandpipers than to swans and duck and geese. However, this smaller-jawed, more robust and possibly more primitive pterosaur than Ctenochasma (shown here ), is known from the Upper Jurassic of France, at roughly the same time as its German relatives Ctenochasma and Gnathosaurus, but much earlier than the Argentinian Pterodaustro.

This animal is very distinct because of the very long, slender wings, with four phalanges (Ctenochasma has only three -- that I can find), and the large, robust humerus, the deeper skull, the relatively shorter dentigerous (tooth-bearing) portion of the jaw, the shorter post-artibular region of the lower jaw, and the long crest at the back of the skull, which from the shapes and elements of the bones probably attached several neck muscles and tendons, likely for pulling the skull up and back. As this animal was likely eating aquatic prey, as in it's slender-snouted relatives named above (which were more likely to be filter-feeders than this one), the slender teeth and skull-neck region were likely intimately involved in this. The long wings may have operated like stilts in shallow water, but very useful in flight.

Description
Well, really, there's nothing truly "swan-beaked" about Cycnorhamphus, despite that being the name's meaning. Given the gentle curvature of the snout, the long neck, and the long legs, one is more inclined to plovers and sandpipers than to swans and duck and geese. However, this smaller-jawed, more robust and possibly more primitive pterosaur than Ctenochasma (shown here ), is known from the Upper Jurassic of France, at roughly the same time as its German relatives Ctenochasma and Gnathosaurus, but much earlier than the Argentinian Pterodaustro.

This animal is very distinct because of the very long, slender wings, with four phalanges (Ctenochasma has only three -- that I can find), and the large, robust humerus, the deeper skull, the relatively shorter dentigerous (tooth-bearing) portion of the jaw, the shorter post-artibular region of the lower jaw, and the long crest at the back of the skull, which from the shapes and elements of the bones probably attached several neck muscles and tendons, likely for pulling the skull up and back. As this animal was likely eating aquatic prey, as in it's slender-snouted relatives named above (which were more likely to be filter-feeders than this one), the slender teeth and skull-neck region were likely intimately involved in this. The long wings may have operated like stilts in shallow water, but very useful in flight.