(sue-doe-bow-dough) is a naked bicosoecid stramenopile. As with other bicosoecids, it attaches to the substrate by the tip of the recurrent flagellum. The anterior flagellum is directed away from the substrate, beats with an undulating pattern, and draws a current of water with suspended bacteria (its food) towards the cell. The cell has a ridge to one side of the flagellum and this marks the margin of the ingestion region. Phase contrast.