Pseudodifflugia spec.
Pseudodifflugia spec.
Pseudodifflugia klarae, the Netherlands

Pseudodifflugia klarae Kiss and Török, 2009

Diagnosis: Shell oval or pyriform, rigid, slightly compressed and scarcely or densely agglutinated with small mineral particles; aperture irregular in outline and inconspicuous, not encrusted with xenosomes, and without organic rim; nucleus contains one eccentric nucleolus and a few bent rods in the nucleoplasm.

Dimensions: Shell length  8-14 µm, mean 9.5 µm (n=34); aperture 0.4-3.0 µm; nucleus 2.7-4.3 µm, nucleolus 1.1-1.2 µm. My measurements: Shell 8.5-14.2 µm long; aperture 1.6 µm; nucleus 2.6-2.8 µm, nucleolus 1.2 µm.

Ecology: in fresh, living plankton samples from the Danube. Feeding on bacteria (Kiss and Török, 2009).

Remarks: Characteristic is also the asymmetrical neck, see photomicrographs a and f below (original from Kiss and Török) and my images above.

Pseudodifflugia spec.
Pseudodifflugia spec.
The same shell, the right one turned 90 degrees. It shows that the aperture can be elongated.
Pseudodifflugia spec.
Pseudodifflugia spec.
From Kiss et al, 2009
Pseudodifflugia spec.
From the Spiegelplas, the Netherlands, 2019
Pseudodifflugia spec.
From the Spiegelplas, the Netherlands, 2019
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