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Sphaerastrum fockii (Archer, 18969) emend. Mikrjukov, 1996

Diagnosis: Cells 9-32 µm in diameter, average 22 µm, surrounded by a not always clearly visible thick mucus layer. Cytoplasm and mucus not or hardly separated from each other.  Numerous needle shaped spicules are tangentially or sub-tangentially oriented in the mucus layer, 30-40 µm long, of uniform thickness. Several contractile vacuoles present, sometimes bulging. Cells may form colonies by aggregating of 10-12 individuals connected by cytoplasmic bridges; mucus cover and spicules apply in this case on the entire colony.

Ecology: Freshwater. Between water plants. Distribution: Europe, South-America.

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Difflugia fallax

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Zivkovicia compressoidea

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Zivkovicia flexa

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Lagenodifflugia epiouxi

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Centropyxis lapponica

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Chaos spec. 6

Chaos spec., Crailoo, 2021 Chaos spec. This specimen was found in a samples from Crailoo, Netherlands. It was remarkable because of the absence of crystals.

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Bullinularia maxima

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