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Paralieberkuehnia elegantula
Paralieberkuehnia elegantula, 21 µm

Paralieberkuehnia elegantula (Penard, 1904)

Diagnosis: Shell spherical with short tubular neck, composed of organic material, finely granulated, without any embedded xenosomes; hyaline, colorless, older shells yellow till dark-brown. Cytoplasm pear-shaped with an asymmetrical bundle of filopodia (“Pseudopodienstiel”) which are granular (extrusomes),  thin, usually very straight, not resting on any substrate, sometimes branching and anastomosing. Nucleus relatively large, globular with a central nucleolus. One or two contractile vacuoles. Division in the shell, a ciliated swarmer leaves the cell.

Dimensions: Penard: 20-25 µm; my measurements: 18-26 µm.

Ecology: Freshwater; shallow, iron rich water, between Sphagnum and in sediments, but also in small rivers and ponds.

Remarks:

Paralieberkuehnia elegantula
Paralieberkuehnia elegantula
Paralieberkuehnia elegantula with cilium and after Penard, 1904
Shell of Paralieberkuehnia elegantula
Paralieberkuehnia elegantula
Paralieberkuehnia elegantula
Shell, 21 µm, with collar visible; same specimen as below – Crailoo and shell, 16 µm, with granular wall – Tirol, Austria, probably another species.
Paralieberkuehnia elegantula
Paralieberkuehnia elegantula, 21 µm – Crailoo, Netherlands
Paralieberkuehnia elegantula
Paralieberkuehnia elegantula
Paralieberkuehnia elegantula, – Kromme Rade, Netherlands
Paralieberkuehnia elegantula
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