Description

Description: Thallus radially spreading, felt with fleecy surface or firm, leathery, dirty grey-blue-green to dark brown. Filaments long, flexuousus and curved, 2.6 – 4.1 (5.0) μm wide. False branching rare, single and geminate. Sheath thin and colorless or dull grey, with increasing age becoming thick, ocassionally swollen, slightly to intensely brownish, sometimes with sharply outlined almost blackish outer layer. Trichomes slightly constricted and sometimes granulated at cross-walls, 2.2 – 2.6 μm wide. Cells cylindrical, isodiametric to elongated, with 4 - 6 parietal thylakoids, 2.2 – 4.3 μm long. End cells rounded. Necridia present. Trichome fragmentation occurred with or without necridia and led to the formation of short hormogonia. The cell division symmetrical and perpendicular to the long axis of the filament; however in meristematic zones it may be oblique. D 1 - D 1 ’ helix 67 nucleotides long, with four internal loops at positions 6 / 54 – 62, 13 - 15 / 45 - 47, 21 / 39 and 24 / 35 - 36, with terminal loop having sequence 5 ’ - CAUG - 3 ’. Box B helix 35 nucleotides long, with two unpaired cytosine residues at positions 10 and 30. Terminal loop 5 nucleotides long, 5 ’ - GACAG- 3 ’. V 2 helix 10 nucleotides long, terminal loop 4 nucleotides, 5 ’ - AUGA- 3 ’. V 3 helix 60 nucleotides long, with two asymmetrical internal loops at positions 5 / 54 - 56 and 23 / 33 - 34, and two unpaired uracil and adenine residues at positions 46 and 51 of the 3 ’ strand. Terminal loop 3 nucleotides long, 5 ’ - GAU- 3 ’. Collection locality: The coast of the Sea of Azov, vicinities of Kazantip Nature Reserve, Aqtash Lake spit, Crimea, Ukraine, 45 ° 43 ′ 85 ″ N 35 ° 85 ′ 25 ″ E, collected on 8 August 2012 by Tatiana Mikhailyuk. Coquina beach, biocrusts with dominance of cyanobacteria.

Common Names

Taxonomic Hierarchy

Kingdom: Bacteria

Phylum: Cyanobacteria

Class: Cyanobacteriia

Order: Synechococcales

Family: Oculatellaceae

Genus: Timaviella

Species: Timaviella edaphica (Elenkin) O.M.Vynogr. & Mikhailyuk