portrait

Description:

Trinema (try-knee-ma) enchelys, a testate amoeba. The focal plane on the circular aperture of the shell of Trinema enchelys. The aperture is located on the ventral surface and is surrounded by a number of rows of very minute scales. The central located contractile vacuole is visible and at the posterior end of the cell the macronucleus. This specimen was collected in a freshwater pond near Konstanz, Germany. Differential interference contrast.