Related how?

Biota (Life)
Eukaryote (Eukarya)
Chromista
Harosa
Halvaria
Alveolate (Alveolata)
Dinozoa
Dinoflagellata (Dinoflagelate)

Ovoidinium (25365659)

Children (3 direct children, 3 direct and indirect children):

Ovoidinium cinctum

Ovoidinium diversum

Ovoidinium implanum