Life in a pond: Algae: Zygnemales: Staurodesmus Staurodesmus convergens Staurodesmus convergens Staurodesmus convergens Staurodesmus dejectus Staurodesmus dejectus Staurodesmus dejectus Staurodesmus megacanthus Staurodesmus megacanthus Staurodesmus megacanthus Staurodesmus triangularis Staurodesmus triangularis Staurodesmus triangularis
		freshwater life procaryota algae plants protists "worms" molluscs arthropods marine life mediterranean tropical misc impresssum plingfactory