the root (no rank)
Eukaryota (domain)
Alveolata (kingdom)
Ciliophora (phylum)
Spirotrichea (class)
Stichotrichida (order)
Oxytrichidae (family)
[hide inferior taxa]
Gonostomum sp. (species)
Oxytricha (genus)
Sterkiella histriomuscorum (species)
Stylonychia (genus)