the root (no rank)
Eukaryota (domain)
Alveolata (kingdom)
Ciliophora (phylum)
Ciliata (alias)
[hide inferior taxa]
Heterotrichea (class)
Karyorelictea (order)
Litostomatea (class)
Nassophorea (class)
Oligohymenophorea (class)
Spirotricha (subclass)
Spirotrichea (class)