Actinosphaerium eichhornii
Genus Actinosphaerium Stein, 1857
Diagnosis: Spherical naked heliozoa with numerous small nuclei. Cytoplasm often with a discrete peripheral layer of large vacuoles, and the nuclei occur at the inner boundary of this layer. Axonemes terminate on the nuclei or an electron-dense material near the nuclei.
References: Anderson and Beams (1960).
Exocytose of a bunch of diatoms
Actinosphaerium eichhornii