Family: Body monopodial; pseudopods rare; locomotion by slight forward bulging; cysts common (Illustrated Guide, 1985).
Genus: Body 6-9 times longer than broad; hyaline cap 1-2 times as long as broad (How to know the ptozoa, 1979). Hyaline cap usually present in locomotion; cysts uninucleate (Illustrated Guide, 1985).

Hartmannella sp. 5 clips 40 x 6 μm Higashi-hiroshima Hiroshima, 1998

Hartmannella sp. 8 clips 50 x 7 μm Higashi-hiroshima Hiroshima, 1998