trophont and cyst

Description:

Stephanoeca (steff-ann-owe-eek-a) is a collar flagellate in which the body is located within a lorica, which is made up of siliceous spicules. In this case the spicules cannot be seen individually. One cell (to the left) is active and has a flagellum projecting from the anterior of the cell and the base of the flagellum is surrounded by a collar of fine pseudopodia. The cell to the right seems to have encysted. Phase contrast micrograph.