Biota (Life)
Eukaryote (Eukarya)
Chromista
Harosa
Halvaria
Alveolate (Alveolata)
Ciliophora (Ciliates)
Oligohymenophorea
Peritrichia (Peritrich)
Sessilida (Sesselida)
Epistylididae
Children (2 direct children, 2 direct and indirect children):
Opisthostyla thienemanni
Opisthostyla sertularium