Heterosaccus
Heterosaccus is a genus of barnacles in infraclass Rhizocephala. Like other taxa in this group, they parasitize crabs. Geoffroy Smith circumscribed the genus in 1906; he initially only included "H. hians". Smith circumscribed a genus distinct from "Sacculina" due to a difference of the mesentery; in "Heterosaccus", the mesentery does not stretch down to the mantle opening but rather only is present on the ring of attachment. Species. , WoRMS recognizes the following fifteen species.