Cycnorhamphus (meaning "swan beak") is a genus of gallodactylid ctenochasmatoid pterosaur from the Late Jurassic period of France and Germany, about 152 million years ago.

The specimen was acquired by the Bayerische Staatssammlung für Paläontologie und Geologie but was lost in April 1944 during the Munich bombardment.

[10] The name is derived from Greek κύκνος, kyknos, "swan" and ράμφος, ramphos, "beak", in reference to the snout shape.

During the late 1960s, the Ghirardi family began to exploit the chalkstone quarries of Les Besson, located on the French army base of Canjuers near Aiguines.

[14] In 1974, French paleontologist Jacques Fabre based on this specimen, MNHN CNJ-71, named a new species Gallodactylus canjuersensis.

He concluded it was the same genus as P. suevicus, but did not revive Cycnorhamphus, judging that the latter name was unavailable because of mistakes in the diagnosis by Seeley, already pointed uit by Plieninger.

However, in 1996, Christopher Bennett pointed out that such mistakes do not invalidate a name and that therefore Cycnorhamphus has priority, making Gallodactylus canjuersensis C.

[4] In 2010 and 2012, Bennett published further re-studies of the fossils, concluding that the differences between the two species could be explained by age, sex or individual variation, and formally synonymized C. canjuersensis and C.

It has been speculated that the jaws functioned similar to those of openbill storks, allowing the animal to hold hard invertebrates like mollusks and either crush or bisect them.