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Belonocystis spec.
Belonocystis spec.
Belonocystis sp.  – the Netherlands

Belonocystis spec. or Luffisphaera??

Diagnosis: I found some cells in a sample from a water inlet for tap water infiltration in the dunes. It was very oligotrophic water. All cells looked like a Belonocystis species, with waving filopodia without granules and with V-shaped spines, like the Eiffel tower. The filopodia are relatively short compared with other Belonocystis species, nearly rod-shaped. One cell was observed with some branched filopodia attached to the cover glass.

Dimensions: cell body 11-12 µm in diameter; spines c. 6.6-7.8 µm long and c. 2.5-2.9 µm broad at the base; nucleus c.3.8 µm;  filopodia c. 15-16 µm  long (n=5).

Remarks: These cells could be an undescribed Belonocystis species, but SEM research is necessary.

Belonocystis spec.
Belonocystis spec.
Branched filopodium attached to the substrate Two filopodia visible
Belonocystis spec.
Belonocystis spec.
The arrow points to one of the circular structures which are in fact the optical diameters of the base of the spicules.
Belonocystis spec.
Belonocystis spec.
Belonocystis spec.
Belonocystis spec.
Air-dried specimen
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