This highly contractile marine ciliate has ventral cirri in oblique and marginal rows and three rows of dorsal cilia, thus it is a hypotrich ciliate. The adoral zone of membranelles shows clearly the arrangement of cilia in relation to membranelles. The very special dorsal cilia (visible as a lateral row) each emerge from a cortical papilla. Scalebar indicates 100 µm.
Collected from Bodden, the brackish waters lying between the isles of Hiddensee and Ruegen (German Baltic Sea). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.