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 spherical, 48 μm in diam., axopodia up to 40 μm long,
x 640, a small dam at Ichinokawa (river) near Suwa-numa, Minami-yoshimi, Yoshimi town, Saitama Pref., Japan, March 25, 2006 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
A small dam at Ichinokawa (river) near Suwa-numa, Minami-yoshimi, Yoshimi town, Saitama Pref., Japan, March 25, 2006 by Y. Tsukii