the root (no rank)
Eukaryota (domain)
Alveolata (kingdom)
Ciliophora (phylum)
Oligohymenophorea (class)
Hymenostomatida (order)
Tetrahymena (genus)
[hide inferior taxa]
Tetrahymena americanis (species)
Tetrahymena australis (species)
Tetrahymena borealis (species)
Tetrahymena canadensis (species)
Tetrahymena capricornis (species)
Tetrahymena caudata (species)
Tetrahymena elliotti (species)
Tetrahymena furgasoni (species)
Tetrahymena hyperangularis (species)
Tetrahymena leucophrys (species)
Tetrahymena malaccensis (species)
Tetrahymena mimbres (species)
Tetrahymena nanneyi (species)
Tetrahymena nipissingi (species)
Tetrahymena paravorax (species)
Tetrahymena patula (species)
Tetrahymena pigmentosa (species)
Tetrahymena pyriformis (species)
Tetrahymena rostrata (species)
Tetrahymena sonneborni (species)
Tetrahymena sp. (species)
Tetrahymena thermophila (species)
Tetrahymena tropicalis (species)