Eukaryota  >  Ciliophora  >  Spirotrichea  >  Urostylida

Family	Genus	Species
Bakuellidae	3	12
Hemicycliostylidae	3	7
Holostichidae	4	49
Pseudokeronopsidae	8	28
Pseudourostylidae	2	11
Urostylidae	22	68