''Polyascus'' is a genus of
barnacles in infraclass
Rhizocephala. It was
circumscribed
In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius.
Not every polyg ...
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.
References
Barnacles
Parasites of crustaceans
Parasitic crustaceans
Crustacean genera
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