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).
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Actinophrys sol, x 400, x 640, Uruguay Nov. 1999, photo by Yuuji Tsukii
