Test of Centropyxis cf. aculeata with embedded frustules of . indicates 50 µm.
Sample from a freshwater pond on the island of Hiddensee (Baltic Sea, Germany). The image was built up using several photomicrographic frames with manual stacking technique. The images were taken using Zeiss Universal with Olympus C7070 CCD camera.
For permission to use of (high-resolution) images please contact postmaster@protisten.de.
Wolfgang Bettighofer, www.protisten.de.