FIGURE 3. A–S in Roholtiella, gen. nov. (Nostocales, Cyanobacteria)-a tapering and branching cyanobacteria of the family Nostocaceae

FIGURE 3. A–S. Roholtiella mojaviensis, sp. nov. A. Hormogonia. B–C. Maturing hormogonia. D–H, L–M. Tapered Calothrix-like filaments. E. False branching. H. Isopolar filament with two adjacent intercalary heterocytes, arrow marks a point of subsequent breakage. I–J. Mature filaments with near-spherical cells. K. False branching. N–Q. Rows of arthrospores. R. Releasing of arthrospores from the opened end of the filament. S. Mature tapered filament with thick structured colored sheath. Strains used in this figure: CCALA 1051 = A, D–I, K–O, Q–R, CCALA 1052 = B–C, J, P, S. Scale bar applies to all figures, in A–J and L–S = 20 μm, in K = 50 μm.