Comodactylus is a genus of "rhamphorhynchoid" pterosaur from the Kimmeridgian-Tithonian-age Upper Jurassic Morrison Formation of Wyoming, United States, named for a single wing metacarpal. In 1879 collector sent some fossil material he had dug up at Como Bluff in Quarry N° 9, or the "Mammal Quarry", to his employer Professor Othniel Charles Marsh at New Haven. Among it was the bone of a pterosaur, that was subsequently filed, stored and forgotten.