Epistylis sp. ciliates feeding. Crop of three individuals of a colony. Epistylis is a genus of sessile (sedentary) single-cell protozoans, with a long stalk and a flattened head. At the top of the head is the mouth, surrounded by many fine cilia hairs. These create a vortex in the surrounding water, washing food particles into the mouth. Microscopic contrast technique : Differential interference contrast. Magnification 370x when printed 10 centimetres wide.
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