Amoeboid of the month

 

Allogromia

This might surprise you. It's an Arcella, Arcella formosa. It's a rare species and very large, up to 350 µm. I've found it at several locations in the Netherlands, but only in mesotrophic water bodies. It has also been reported from Northern America and Germany. Within a population you may find small and large tests.

 

 

Phryganella acropodia

 

Hyalosphenia - Assulina - Arcella - Difflugia - Cyphoderia - Centropyxis - Nebela