Citation: Phytodiniales Christensen 1962 ex
Loeblich III 1970.
Diagnosis: Dinophyceans in which the principal life-cycle stage comprises a coccoid (vegetative cyst) stage without a calcareous wall, or a continuous-walled multicellular stage, or in which an amoeboid stage is present in a life-cycle which also includes a coccoid stage.
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