Related how?

Biota (Life)
Eukaryote (Eukarya)
Chromista
Harosa
Halvaria
Alveolate (Alveolata)
Ciliophora (Ciliates)
Oligohymenophorea
Hymenostome (Hymenostomatia)

Tetrahymenidae (15211199)

Children (1 direct children, 4 direct and indirect children):

Tetrahymena (tree size 3)