the root (no rank)
Eukaryota (domain)
Alveolata (kingdom)
Ciliophora (phylum)
Spirotrichea (class)
Stichotrichida (order)
Oxytrichidae (family)
Oxytricha (genus)
[hide inferior taxa]
Oxytricha fallax (species)
Oxytricha granulifera (species)
Oxytricha nova (species)
Oxytricha sp. (species)
Oxytricha trifallax (species)