Related how?

Biota (Life)
Eukaryote (Eukarya)
Chromista
Harosa
Halvaria
Heterokonta
Bigyra
Opalozoa
Opalinata

Opalinea (2621841)

Children (2 direct children, 10 direct and indirect children):

Opalinida (tree size 8)

Karotomorphida