Morphological diversity among the cyanobacteria: the five major morphological types of cyanobacteria (a)Unicellular, Gloeothece, Phase contrast; a single cell measures 5-6 um in diarneter;(b )colonial, Dermocarpa. Phase contrast (c)filamentous, Oscillatoria, brightfield; a single cell measures about 15 um wide;(d) filamentous heterocystous, Anabaena, phase contrast; a single cell measures about 5 um wide;(e) filamentous(a)Unicellular, Gloeothece, Phase contrast; a single cell measures 5-6 um in diarneter; (b) colonial, Dermocarpa. Phase contrast; (c)filamentous, Oscillatoria, brightfield; a single cell measures about 15 um wide; (d) filamentous heterocystous, Anabaena, phase contrast; a single cell measures about 5 um wide; (e) filamentous branching. Fischerella, bright-field. Morphological diversity among the cyanobacteria: the five major morphological types of cyanobacteria