Eukaryota  >  Ciliophora  >  Oligohymenophorea  >  Peniculida

Family	Genus	Species
Apofrondoniidae	1	2
Frontoniidae	2	70
Lembadionidae	1	8
Parameciidae	1	89
Stokesiidae	2	5
Urocentridae	1	8