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Heliozoea: Actinophryida

 Actinophrys sol
Ehrenberg, 1830

Actinophrys Genus (Ehrenberg, 1830): Spheroidal; cytoplasm vacuolated, especially ectoplasm; nucleus central; one to many contractile vacuoles; axopodia straight, axial filaments terminate at surface of the nucleus (Kudo, 1966).
Species: Ectoplasm vacuolated; a large central nucleus; diameter average 40-50 μm (Kudo, 1966).

Actinophrys sol Ehrenberg, cell body 31 μm in diam., axopodia about 50 μm wide, x 640, Numa-no-hara marsh (Genseikaen), Madarao highland (Niigata & Nagano Pref.), Myoko village, Niigata Pref., Japan, May 15, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Actinophrys sol Actinophrys sol

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