Long classified with other filose testate amoebae, most of which are in the supergroup Rhizaria, Amphitrema is now known to be a stramenopile (like kelp, diatoms and the water molds).
From Mer Bleue sphagnum bog, Ottawa. Collected in mid May, 2013.
Olympus BHB 100X oil immersion obj. (1000X)