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.

The holotype is YPM 9150, consisting of an intact fourth metacarpal measuring 57.5 millimeters (2.26 in) long.

Such proportions are typical for basal pterosaurs such as Rhamphorhynchus, suggesting Comodactylus was not a member of the advanced Pterodactyloidea.

However, assigning it to a pterosaur clade beyond the paraphyletic group "Rhamphorhynchoidea" has proven difficult due to a lack of diagnostic material.

[citation needed] The wingspan has been estimated at 2.5 meters (8.2 ft), exceptionally large for a pterosaur not belonging to the Pterodactyloidea.