Kryptousia sp.1

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 : 24-25

Kryptousia sp.1 ( Fig.15L–Q ).

Filaments entangled, forming mats on substrata, 4.91–16 µm wide. Trichomes erect or coiled, cylindrical up to slightly attenuated, with bilateral (X type) and tolypothricoid branches, slightly constricted in meristematic zones. Sheath absent or firm, 0.67–3.08 µm wide, non-lamellated, hyaline to brown. Apical cell rounded or rounded-conical. Cell isodiametric, sub-quadratic or short in meristematic zones, 3.24–15.12 µm wide, 2.91–18.5 µm long, ratio l/w = 0.72. Cell content granulated, grayish-green to purple. Basal heterocytes elliptical to semielliptical or isodiametric, short when intercalary, 4.63–6.75 µm wide, 2.84–5.66 µm long. Necridia present.

Habitat: —Concrete in the shade.

Notes: —The habitat and coiled forming trichomes on substrata are the diacritical features that distinguish this morphotype from other Kryptousia Alvarenga, Andreote, Branco & Fiore species.

Studied material: — PEUFR 55778, PEUFR 56637

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).