cells in the colonies tightly packed, not separated from each other
no visible gelatinuous sheath
many visible division stages in the colonies
cell content is slightly granulated
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I find this form of rhodobacteria very rarely and exclusively in the Simmelried. This species differs from all other types of rhodobacteria by the compact, spherical colonies and the large, up to 10 µm long cells, which are slender oval or oblong shaped.
Fig. 1:Rhodobacteria 12. L = 4.0–10.0 µm. A slightly squashed, spherical colony with a diameter of 60 µm. The cells alre tightly packed and some cell divisions are visible. Obj. 100 X.