Pseudodifflugia spec.

Diagnosis: Shell spherical, agglutinated with some small mineral particles; aperture relatively large, irregularly circular, nucleus hard to detect. Filopodia long, branching and occasionally anastomosing.

Dimensions: Diameter c. 30 µm, aperture c. 9.8 µm (n=1).

Ecology: shallow freshwater pond, Crailoo, the Netherlands (2018).

Remarks: Filopodia typically retract in Z-shape.