Content: Among myxobacteria, one of the amazing characteristics of Sorangium cellulosum is its cellulose degradation.Place filter paper on a simple inorganic salts plate for isolation and purification of Sorangia is a conventional procedure.Furthermore, filter paper degradation is also the identification and classification character for Sorangia.However, among the cellulose degradation microorganisms, few can grow rapidly, like Sorangia, on the filter paper as the sole substrate.So Sorangia can be an ideal model to reveal some novel characters in cellulose degradation.