Scytonema stuposum Bornet ex Bornet et Flahault (1886: 92)

Da Anunciação, Raylane R., Paulino, Jonatas M., Moura, Ariadne N., Iv, H. Dail Laughinghouse & Gama, Watson A., 2024, Morphometric Characterization And The First Taxonomic Synthesis Of Terrestrial Cyanobacteria From The Atlantic Forest In Northeastern Brazil, Phytotaxa 646 (1), pp. 1-31 : 22

Scytonema stuposum Bornet ex Bornet et Flahault (1886: 92) ( Fig. 13J–L ).

Filaments entangled, erect or slightly coiled, 11.78–21.49 μm wide. Sheath firm, 1,38–4,35 μm wide, smooth, lamellated or not. Trichomes cylindrical, false geminate branched, constricted. Cells short, 10.52–17.01 μm wide, 2.37–4.89 (6.48) μm long, ratio l/w = 0.30. Apical cell conical-rounded. Cell content granulated, blue-green. Heterocyte ellipsoidal to sub-quadratic, 9.83–16.5 μm wide, 2,82–7,6 μm long, in intercalary position.

Habitat: —Concrete

Studied material: — PEUFR 56648

Figures

FIGURE 13. A–C. Scytonema guyanense; D–E. Scytonema javanicum; F–I. Scytonema schmidtii. False branch (arrow); J–L. Scytonema stuposum; M–O. Scytonemataceae sp. Scale: 50 μm (G); 10 μm (to the others).