portrait

Description:

Portrait of choanoflagellate, Codosiga botrytis. Cells are clustered on simple, terminally branching stalk. Circumferential collar of microvilli can be seen. Single long flagellum directs food particles to the outside surface of the microvilli along which they move to be ingested at the apex of the cell. Adhering food particles are seen in these images. From a freshwater pond near Boise, Idaho. Phase contrast.