Description

Description: Thallus radially spreading, expanded, leathery, brownish, dark olive, blue-green to light greenish. Filaments long, variously curved, (3.0) 3.8 - 4.9 (6.0) μm wide. False branching rare, mostly double. Sheath colourless, firm, thick. Trichomes slightly constricted at cross-walls, occasionally becoming almost biseriate due to oblique division and compression of cells, 2.2 – 3.3 μm wide. Cells cylindrical, isodiametric to longer than wide, with parietal thylakoids, 2.2 – 3.5 μm long. End cells rounded to conical. Necridia in both young and senescing trichomes, hormogonia rare. D 1 - D 1 ’ helix 85 nucleotides long, with a 3 ’ unilateral bulge at position – / 73 - 80, five internal loops at position 10 / 68, 14 - 15 / 63 - 64, 20 / 58, 23 / 54 - 55 and 31 / 46. Terminal loop having sequence 5 ’ - UCUC- 3 ’. Box B helix 48 nucleotides long, with several assymetrical internal loops at position 6 / 41 – 42, 9 – 10 / 39 and – / 30 – 32. Terminal loop 5 nucleotides long, 5 ’ - AUAAU- 3 ’. V 2 helix 10 nucleotides long, terminal loop 4 nucleotides, 5 ’ - AUUA- 3 ’. V 3 helix 60 nucleotides long, with several internal loops at positions 4 / 53 – 55, 9 – 10 / 47 – 50 and 23 / 34. Terminal loop having sequence 5 ’ - GAAA- 3 ’.

Common Names

Taxonomic Hierarchy

Kingdom: Bacteria

Phylum: Cyanobacteria

Class: Cyanobacteriia

Order: Synechococcales

Family: Oculatellaceae

Genus: Timaviella

Species: Timaviella dunensis Mikhailyuk & Vynogradova, 2022