Mastigocladopsis 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 : 24

Mastigocladopsis sp. ( Fig. 14O–S ).

Filaments prostrate. Sheath firm, thin, non-lamellated, hyaline to brown. Trichome uniseriate, branching T-shaped, constricted. Apical cell rounded-conical. Cells isodiametric in main filament and cylindrical in branches, 3.09–7.86 µm wide, 2.72–11 µm long, ratio l/w = 1.23. Cell content granulated, grayish-green. Heterocyst cylindrical, 3.09–7.86 µm wide, 2.72–11.77 µm long, in intercalary position. Akinetes pedicellate, spherical, 5.55–8.48 µm wide, sheath firm, thin, brown.

Habitat: —Tree bark.

Notes: —Corticolous habitat, akinetes pedicellate and absence heterocyst pedicellate or lateral are diacritical features differs this morphotype other Mastigocladopsis species.

Studied material: — PEUFR 55789

Family Tolypothrichaceae Hauer, Bohunická, Johansen, Mareš , et Berrendo-Gomez (2014: 1093).

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: — PEUFR 55783, PEUFR 55784, PEUFR 55787

Figures

FIGURE 14. A–C. Scytonemataceae sp.; D–F. Stigonema corticola; G–I. Stigonema fremyi; J–N. Stigonema minutum. O–S. Mastigocladopsis sp.—O. details of the arrangement of the filaments; P. Apical cell; Q. Akinete; E–F. the filament details. Scale: 50 μm (D; G; J; O); 10 μm (to the others).

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).