Eukaryota  >  Ciliophora  >  Oligohymenophorea  >  Sessilida

Family	Genus	Species
Astylozoidae	1	1
Epistylidae	7	71
Lagenophryidae	1	1
Operculariidae	3	17
Ophrydiidae	1	6
Opisthonectidae	2	9
Scyphidiidae	3	7
Usconophryidae	1	2
Vaginicolidae	6	33
Vorticellidae	7	133
Zoothamnidae	3	76