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Heliozoea: Actinophryida

 Actinosphaerium eichhornii
(Ehrenberg, 1840) Stein, 1857

Actinosphaerium Genus: Ectoplasm consists of large vacuoles in one or several layres; endoplasm with numerous small vacuoles; numerous nuclei; axopodia end in the inner zone of ectoplasm (Kudo, 1966).
Species: Cell body spherical, 200-1000 μm in diam.; ectoplasm vacuolated; endoplasm containing both granules and small vacuoles; several contractile vacuoles present; many nuclei located at the perphery of endoplasm.
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Actinosphaerium eichhornii (Ehrenberg, 1840) Stein, 1857 (Echinosphaerium), cell body spherical, 170 μm in diam., multinucleated, x 640, Iono michino-eki, Nasu town, Tochigi Pref., Japan, January 3, 2004 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
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