The Bucephaloidea are a superfamily of trematode flatworms, belonging to the large group Digenea.

By what Manter calls a "curious circumstance", horns are also suggested by the long tentacles of adult worms.

Finally, the adult flatworm typically inhabits the alimentary system or other body cavity of a fish.

One characteristic feature is an anterior rhyncus or holdfast that is separate from the digestive system.

It has many features similar to the bucephalids, but the body is sharply subdivided in two parts.