Diagnosis_Genus: The trophont develops inside the endoplasm of its host (Radiolaria, Polycystinea, Spumellarida). Chromosomes have a normal appareance at this stage. Digitations of the cytoplasm are formed. A small structure, likely homologous to the lamina pharyngea in Euduboscquella, is formed at the external part of one of these digitations. Sporulation develops inside the ectoplasm, and starts when one or more digitations pass through the host shell. During sporulation, chromosomes have a V-shaped appearance.
Diagnosis-Species: This parasite is infecting Actinosphaera capillaceum. During the growth of the trophont, the host spicules are included inside the parasite cytoplasm, which contains also a lot of vesicules. Sporulation not described.