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This image shows a recently settled cell. There are tentacles which are swollen at the apices. The surface of the cell has a few cilia - remaining from the swimming larva that settled to produce this feeding form. Phase contrast microscopy.
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Ciliated larval stage of the suctor. Phase contrast micrograph of living cell.
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Trophic suctorian cell, each tentacle or arm is a mouth, the expanded termini contain extrusomes that will grab hold of prey - mostly other ciliates.