Cytophaga , Lysobacter , Beggiatoa , Leucothrix , Achronema- These bacteria are highly diverse but all exhibit gliding motion. Some forms liks Beggiatoa may form filaments, oxidize H2S and deposit sulphur intracellularly. Cytopage sp. on the other hand , do not form filaments but can hydrolyze, cellulose and chitin. Their ecological importance has been realized in the decomposition of the organic matter.