Amoeboid of the month

 

Arcella spectabilis
This applicable star in the month of December is a large multinucleate heliozoan, Actinosphaerium eichhornii. It resembles a piece of soap suds, is about 500 µm in diameter, but can reach a size of three mm. Inside the body you can see a captured rotifer and some algae.

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Testate amoebae

 

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