Porphyrosiphon kaernbachii (Hennings) De Toni (1892: 134)

Da Anunciação, Raylane R., Paulino, Jonatas M., Moura, Ariadne N., Laughinghouse IV, H. Dail & 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 : 16

Porphyrosiphon kaernbachii (Hennings) De Toni (1892: 134) ( Fig. 10J ).

Basonym: Scytonema kaernbachii Hennings (1892: 8) .

Filaments solitary or in groups, flexuous, irregularly arranged on substrata, (5.28) 7.46–13.27 µm wide. Trichomes cylindrical, slight constricted. Sheath absent or firm, smooth, no lamellae or slight lamellated, hyaline to reddish-brown. Cells isodiametric to short, 8.98–13.03 µm wide, (3.25) 3.76–12.69 µm long, ratio l/w = 0.66. Apical cell conical or rounded-conical, without calyptra or thickening. Cell content granulated, blue-green. Necridia present.

Habitat:— Tree bark.

Studied material:— PEUFR55792

Figures

FIGURE 10. A–B. Chroococcidiopsis sp.1; C–D. Chroococcidiopsis sp.2; E–F. Pycnacronema rubrum; G. Microcoleus vaginatus; H–I. Porphyrosiphon ceylanicus; J. Porphyrosiphon kaernbachii; K. Lyngbya ocreata; L–N. Dapisostemon sp.; O–R. Komarekiella sp.— different stages of the life cycle. Scale bar: 50 μm (L); 10 μm (to the others).