What is "bucephaloidea"

The Bucephaloidea are a superfamily of trematode flatworms, belonging to the large group Digenea. They contain numerous endoparasites of mollusks and fish. The name Bucephalus meaning "ox head" was originally applied to the genus Bucephalus because of the horn-like appearance of the forked tail (furcae) of its cercaria larva. By what Manter calls a "curious circumstance", horns are also suggested by the long tentacles of adult worms.

Most trematodes have several distinct developmental stages. The motile cercaria larva is released by the first intermediate host, typically a snail, and parasitizes a second intermediate host, where it encysts into a metacercaria. Finally, the adult flatworm typically inhabits the alimentary system or other body cavity of a fish.

Families in the Bucephaloidea include Bucephalidae and Nuitrematidae.