Polyascus

Polyascus is a genus of barnacles in superorder Rhizocephala. It was circumscribed in 2003 by Henrik Glenner, Jørgen Lützen, and Tohru Takahashi. They included three species, all transferred from "Sacculina". The generic name "polyascus" ("poly" "many" + "ascus" "bag") refers to the typical presence of multiple external sac-like female bodies, known as "externae". In "Polyascus" species, these originate from asexual reproduction.
Species.
, WoRMS recognizes the following three species,
all included in the genus's circumscription.