Pseudodifflugia virescens
Unknown species, c. 68 µm

 

Unknown species

 

Diagnosis: Shell not distinct and rigid like Pseudodifflugia, but highly flexible, very flattened, densely agglutinated with mineral xenosomes, resembling the covering of Gocevia obscura; shape changing, from circular to oval or pyriform; many long anatomosing and branching filopodia without any granules; nucleus not observed because of the dense covering with xenosomes.

 

Ecology: freshwater sediment. Crailoo, the Netherlands, in floating sediments which came from the bottom.

 

Remarks: I found only one specimen which spread out its filopodia shortly after the transport by pipet from the sample jar to the slide. The 'shell' was very low, just like a mantle. The general impression was that of a Pseudodifflugia species, but a distinct shell was lacking. In fact it was impossible to see whether the cell was filled with xenosomes or covered with it.

 

Phase contrast
Reticulopodia
Bright field