Related how?

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

Echinidinium (25365213)

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

Echinidinium aculeatum

Echinidinium bispiniformum

Echinidinium granulatum

Echinidinium transparantum