Hassallia sp.

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 : 24

Hassallia sp. ( Fig. 15D–F ).

Filaments entangled, epiphytic on other cyanobacteria, 5.51–8.27 (9.62) µm wide. Sheath firm, 0.4–1.56 µm wide, non-lamellated, hyaline to brown. Trichomes cylindrical, slightly attenuated, heteropolar, intense tolypothricoid branches, constricted. Apical cell conical to rounded-conical, intensely constricted. Cells sub-quadratic to short, 4.06–6.67 µm wide, 2.11–5.26 µm long, ratio l/w = 0.69. Cell content granulated, grayish-purple. Basal heterocyte elliptical, 3.83– 6.76 µm wide, 2.48–5.83 µm long. Necridia present.

Habitat: —Tree bark; associated with Nostoc interbryum .

Notes: —This morphotype differs from other Hassallia species in relation to its apical cell being intensely constricted

Studied material: — PEUFR55785

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).