Äèàòîìîâûå âîäîðîñëè: 1 — Ethmodiscus gazellae; 2 — Planktoniella sol; 3 — Corethron valdiviae; 4 — Pinularia viridis; 5 — Surirella saxonica (îáðàçîâàíèå àóêñîñïîð); 6 — Asterionella gracillima; 7 — Pleurosigma attenuatum; 8 — Didymosphenia geminata.