Beschreibung:
Aulacodiscus argus (Bacillariophyta, Coscinodiscophyceae, Coscinodiscales, Aulacodiscaceae), diameter 240 µm, Sylt 11.2014. 0:40 min. Thick-walled, with complex system of areoles, one shows radial arrangement. Several labiate processes, not reaching the valve margin. Video can be used for teaching