the root (no rank)
Eukaryota (domain)
Alveolata (kingdom)
Ciliophora (phylum)
Oligohymenophorea (class)
Holotricha (alias)
[hide inferior taxa]
Epistylidae (family)
Hymenostomatida (order)
Peniculida (order)
Peritrichia (subclass)
Vorticellidae (family)