Komarekiella sp.

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 : 16

Komarekiella sp. ( Fig.10O–R ; 11A–C ).

Filaments entangled, uniseriate or multiseriate, forming sub-colonies with numerous cells. Sheath firm, 6.75–13.11 µm wide, non-lamellated, hyaline, rarely conspicuous. Trichomes moniliform, not branched. Cell spherical, oblong or sub-quadratic, 2.5–8.15 µm wide. Cell content granulated, blue-green. Basal heterocyte spherical to semi-spherical, 2.42–3.49 µm wide. Germination of akinetes is asymmetric or in two vegetative cells.

Habitat: —Tree bark and wooden bench.

Notes: —This morphotype differs from Komarekiella atlantica Hentschke, Johansen et Sant’Anna by the filaments being multiseriate only when in division and by not have intercalary heterocytes.

Studied material: — PEUFR 56639, PEUFR 56643

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).

FIGURE 11. A–C. Komarekiella sp.—different stages of the life cycle. D–H. Nostoc interbryum—different stages of the life cycle; D. specimens from field samples; E–H. specimens from cultured strains; F. the filament inside the colonies with individual sheath (arrows); G. heterocyte (arrows). I–L. Brasilonema epidendron; M–O Brasilonema ornatum. Scale bar: 100 μm (E); 50 μm (J); 10 μm (to the others).