Hassallia byssoidea Hassall ex Bornet et Flahault (1886: 116)

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 byssoidea Hassall ex Bornet et Flahault (1886: 116) ( Fig. 15A–C ).

Filaments entangled to solitary, epiphytic on other cyanobacteria, 8.16–10.78 µm wide. Sheath firm, 0.63–1.23 µm wide, non-lamellated, hyaline to brown. Trichomes attenuated, branches tolypothricoid, not constricted. Apical cell rounded. Cells short, 6.64–9.7 µm wide, 1.85–4.45 µm long, ratio l/w = 0.40. Cell content granulated, blue-green. Basal heterocyte elliptical, 7.23–9.64 µm wide, 4.91–7.42 µm long. Necridia present.

Habitat: —Bricks; associated with Gloeocapsopsis sp .. Concrete; associated with Gloeocapsopsis pleurocapsoides and Chlorogloea sp.1 . Tree bark inside the forest; associated with Gloeocapsa sp.1 , Chlorogloea sp.1 , Gloeocapsa compacta and Gloeocapsa stegophila .

Studied material: — PEUFR55783 , PEUFR55784 , PEUFR55787

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).