(a)
(b)
Figure 9: (a) Sterile filaments of Spirogyra species, dominant in the assemblages of algae in the Maksimikha Cove (Barguzinsky Bay of Lake Baikal, July 2012). Scale bar: 20 μm. (b) Sexually mature conjugating cells of Spirogyra species. Scale bar: 40 μm.