Korotnevella stella
Korotnevella stella, Southern France

 

 

Korotnevella stella (Schaeffer, 1926) Goodkov, 1988

 

Diagnosis: Locomotive form variable, usually wider in the anterior part, sometimes it looks like an irregular triangle with anterior hyaline border. The cell forms numerous hyaline dactylopodia. No differentiated uroid. Floating form of radial type, with several long, tapering hyaline pseudopodia. Single nearly spherical nucleus, with central endosome about 3 µm in diameter. One contractile vacuole. Vary small irregular cristals in the cytoplasm of some specimens only. No cysts found.
Ultrastructure: Cell coat includes bascet-like scales.

 

Dimensions: Length in locomotion 31-60 µm (average 46 µm), L/B about 1.5. Nucleus c. 6 µm in diameter.

 

Ecology: Freshwater, small river in limestone area, Southern France

 

Korotnevella stella
Korotnevella stella
Korotnevella stella
Korotnevella stella, moving along a filamental algae
Korotnevella stella
Korotnevella stella
Korotnevella stella
Korotnevella stella, two specimens; the left amoeba has engulfed a large prey.
Korotnevella stella
Korotnevella stella
Korotnevella stella