Hartmannella sp. 1-4: locomotive; 5-6: resting cell;
7-10: cell when changing the direction of movement; 11: posterior
hyaline lobes; 12: nucleus (stained preparation).
Scale bars 1-11: 20 mkm; 12: 10 mkm
Locomotive form monopodial, always with distinct hyaline cap.
No differentiated uroid in most cells, in some - small bulbous uroid.
Posterior hyaline lobes are usual. Length in locomotion 28-70 mkm (average 53
mkm), breadth 7-18 mkm (average 11 mkm). L/B about 5.0.
Single spherical nucleus, about 4 mkm in diameter,
with central endosome about 3 mkm in diameter.
One contractile vacuole usualy situated just below the anterior hyaline
cap. 8-10 small irregular cristals in the cytoplasm.
No cysts found.