Hassallia aff. andreassenii Komárek, Nedbalová et Hauer (2012: 768)

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 : 24

Hassallia aff. andreassenii Komárek, Nedbalová et Hauer (2012: 768) ( Fig.15G–K ).

Filaments ± caespitose, fasciculate, 11.45–27.77 µm wide. Sheath firm, 1.25–4.38 µm wide, non-lamellated or up to 2 lamellae, hyaline to brown. Trichomes cylindrical, heteropolar, with coleosdemoid branches, constricted or not. Apical cell rounded or rounded-conical. Cells isodiametric, sub-quadratic or short, 7.82–20.76 µm wide, 2.1–10.77 µm long, ratio l/w = 0.66. Cell content granulated, blue-green. Basal heterocyte elliptical, 9.15–19.78 µm wide, 5.87–15.16 µm long. Necridia present. Hormogonia next to apical portion, constricted, apical cell rounded, cell short.

Habitat: —Rock fully exposed to the sun; associated with Stigonema fremyi , Microcoleus vaginatus and Scytonema scmidtii .

Notes: —This morphotype differs from Hassallia andressanii by its habitat and geographic occurrence ( Komárek et al. 2012).

Studied material: — PEUFR 55772, PEUFR 55770, PEUFR 56638

Figures

FIGURE 15. A–C. Hassallia byssoidea; D–F. Hassallia sp.; G–K. Hassallia aff. andreassenii—G–I. specimens from field samples; J–K. specimens from cultured strains; L–Q. Kryptousia sp.1—L–M. specimens from field samples; N–Q. specimens from cultured strains. Scale bar: 100 μm (O); 50 μm (A; G); 10 μm (to the others).