FIG. 3 in Morphological description and molecular phylogeny of two diatom clones from the genus Ulnaria (Kützing) Compère isolated from an ultraoligotrophic lake at the Pole of Cold in the Northern Hemisphere, Republic of Sakha (Yakutia), Russia

FIG. 3. — Cells in the culture Ulnaria pilum Kulikovskiy & Lange-Bertalot LAB55 attached to substrate: A, LM, mucilage strands are stained by Alcian blue in single cell; B, LM, cell aggregates; C, SEM, there are no traces of mucilage on the unattached ends of cells, tree closed girdle bands of each valve are pointed by arrowheads; D, SEM, attachment occurs with mucilage excreted through the pore field. Scale bars: A, B, 50 µm; C, 5 µm; D, 1 µm.