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Paralieberkuehnia
Paralieberkuehnia
Paralieberkuehnia elegantula, with an inward tubular structure (arrowed)

Paralieberkuehnia elegantula sensu De Saedeleer, 1934

Diagnosis: Shell spherical, somewhat ovoid, without a distinct neck, but with an inward 5 µm long tubular structure; shell hyaline, somewhat greenish, weak but flexible; contractile vacuole at the base of the bundle of filopodia (peduncle or “Pseudopodienstiel”) together with other vacuoles; cytoplasm with numerous granules and vacuoles in the frontal region; filopodia numerous, starting from a bundle, branching, when disturbed anastomosing, long, sticking to the shell, very motile, with strong streaming of cytoplasm; numerous granules, rather equal in diameter.

Dimensions: De Saedeleer 25.5 µm long and 23 µm broad; nucleus c. 8.5 µm (n = 3); my measurements: 21 µm.

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

Remarks: De Saedeleer observed three specimens. He noted that one specimen had a contractile vacuole behind the nucleus and one specimen contained many symbiotic or not digested algae.

De Saedeleer mentions the presence of an inward tubular pseudostome as very characteristic. He thinks that these structure has been overlooked by Penard, but I have observed specimens which were exactly like Penards P. elegantula.

De Saedeleer includes in his description P. penardi De Saedeleer, 1932

Paralieberkuehnia
Paralieberkuehnia
Paralieberkuehnia elegantula, 23 µm; with an inward tubular structure
Paralieberkuehnia
Paralieberkuehnia
The same cell, in DIC and phase contrast, with an inward structure, but it looks more like a septum.
Paralieberkuehnia
Paralieberkuehnia
Shell with inward tubular structure; Paralieberkuehnia elegantula – from De Saedeleer, 1934
Paralieberkuehnia
Paralieberkuehnia
Inward tubular structure Laegieskamp

Septum or tube? Shell 26 µm; Bert Bospad
Paralieberkuehnia
Paralieberkuehnia
Both shells c. 23 µm, Diepveen, the Netherlands
Two cells close beneath each other, nuclei clearly visible, both c. 23 µm.
Shell with typical edge around its pseudostome
Shell with typical straight granulopodia and -not visible- an inward tubular structure.
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