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