Members of the Seriata, in which the gut is three-branched.
Source: Ball and Reynoldson, 1981.
The following taxa of this suborder occur in the region:
Infraorder Maricola
Family Procerodidae
Genus Micropharynx
Genus Procerodes
Genus Sabussowia
Family Uteriporidae
Genus Foviella
Genus Uteriporus
Foviella affinis
Micropharynx parasitica
Procerodes littoralis
Sabussowia dioica
Uteriporus vulgaris