Cleisthotecium containing ascospores of the fungus that causes powdery meldew on leaves and stems of some trees. Scale bar indicates 500 µm.
Sample from ponds situated in the vicinity of Lake Constance (Bodensee, Southern Germany). The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.