In the upper the oral basket is visible which is the special attribute of the ciliate group called cyrtophorids. This feeding organell is specialized to catch and disaggregate filamentous like Oscillatoria. indicates 25 µm.
Sample from a pond (hegne Moor) situated in the vicinity of Lake Constance. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Wolfgang Bettighofer, www.protisten.de.