Cyanobacteria, the first ever oxygenic photosynthesizers, are said to be the source of chloroplasts in eukaryotes. They are commonly associated with extreme environments. The above Cyanobacterium was collected from cooler waters of LaDuke Spring, a thermal site within Gallatin National Forest.
Originally uploaded in Microbial Life.
Image 2698 is a 224 by 300 pixel JPEG
Uploaded: Oct7 04