(formerly Heliozoea: Ciliophryida)
Genus: Spheroid, with a single flagellum and radiating pseudopods; ordinary attached to foreign
object with a cytoplasmic process, but swim freely by withdrawing it; nucleus central;
several contractile vacuoles (Kudo, 1966).
Actinomonas sp. ?,
cell body 13 μm in diam., axopodia about 15 μm long,
x 640, rice field near Oyomi marsh, Hakuba village, Nagano Pref., Japan, October 3, 2004 by Y. Tsukii
94 μm; x 640
A. mirabilis Kent: Numerous filopodia; about 10 μm
diam., flagellum 20 μm long; fresh water
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