Fig. 7 in Mat-forming coccoid cyanobacteria from early Silurian marine deposits of Sudetes, Poland

Fig. 7. Comparison of early Silurian coccoid cyanobacteria (left) from radiolarian cherts exposed at the Żdanów road−cut (Bardzkie Mountains) and modern coccoid cyanobacteria (right), all optical micrographs. A, C, E. Examples of cells of early Silurian Stanieria−like cyanobacteria at different stage of cell fission filled with minute reproductive cells (baeocytes). E. Optical micrographs with Nomarski illumination. A, C, E, ZPAL Cy.1 GBŻ 49/1−4. B, D, F. Mass culture of Stanieria cf. cyanosphaera (Komárek and Hindák) Komárek and Anagnostidis 1986, grown under irradiance level 20 µmol m–2 sec–1 at 22 · · (~0.5)oC, revealing spherical cells of varying size; some cells are filled with baeocytes (from Silva and Pienaar 2000, with publisher permission http://www.schweizerbart.de).