Scytonemataceae, Rabenhorst ex Bornet et Flahault, 1886

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 : 22

publication ID

https://doi.org/ 10.11646/phytotaxa.646.1.1

persistent identifier

https://treatment.plazi.org/id/8A0B8B74-886E-FF94-FF5E-4AD8CA56FA71

treatment provided by

Felipe

scientific name

Scytonemataceae
status

 

Scytonemataceae View in CoL View at ENA sp. ( Fig. 13M–O View FIGURE 13 ; 14A–C View FIGURE 14 ).

Filaments entangled with apical portion erected, 7.13–31.08 µm wide. Trichomes heteromorphic, cylindrical, slightly attenuated, with intense scytonematoid geminate or single branched and tolypotrichoid branched, not constricted or constricted in meristematic zones. Sheath firm, 0.86–6.77 µm wide, one lamella present or absent, hyaline to brown. Apical cell rounded-conical. Cells isodiametric, sub-quadratic to short in meristematic zones, 4.32–28.64 µm wide, 2.47–8.92 µm long. Cell content homogeneous to granulated, blue-green to grayish-purple. Basal heterocyte elliptical or cylindrical to short when intercalary, 7.5–20.92 µm wide, 2.35–9.16 µm long. Necridia present. Hormogonia slightly constricted or not constricted, attenuated, with basal heterocyte or not, cell short, apical cell rounded.

Habitat: —Tree bark.

Notes: —The corticolous habitat, heteromorphic filaments, intense scytonematoid branching are the diacritical features that distinguish this morphotype from Scytonemataceae species. This morphotype taxa is similar to Scytonematopsis Kisseleva bur differs from not have trichomes distinctly narrowed towards end.

Studied material:— PEUFR 55793, PEUFR 56636

Family Stigonemataceae (Bornet et Flahault) Borzì (1892: 43) View in CoL .

Stigonema corticola Sant’Anna, Kaštovský, Hentschke & Komárek (2013: 15) ( Fig. 14D–F View FIGURE 14 ).

Filaments multiseriate, erect, 20–30.49 µm wide, filaments and branches not clearly distinguishable. Sheath firm, non-lamellated, brown. Cell irregular elongated or ± rounded, 5.54–15.65 µm wide. Cell content granulated, blue-green. Heterocyte rounded to semi-spherical, lateral to intercalary, 5.82–11.33 µm wide. Hormogonia numerous, developed in the apical branches.

Habitat: —Tree bark associated with Gloeocapsa sp.1 , Gloeocapsopsis sp. and Dapisostemon sp.

Studied material: — PEUFR 55774

PEUFR

Universidade Federal Rural de Pernambuco

Kingdom

Bacteria

Phylum

Cyanobacteria

Class

Cyanophyceae

Order

Nostocales

Family

Scytonemataceae

Loc

Scytonemataceae

Da Anunciação, Raylane R., Paulino, Jonatas M., Moura, Ariadne N., Iv, H. Dail Laughinghouse & Gama, Watson A. 2024
2024
Loc

Stigonema corticola

Sant'anna, C. L. & Kastovsky, J. & Hentschke, G. S. & Komarek, J. 2013: 15
2013
Loc

Stigonemataceae (Bornet et Flahault) Borzì (1892: 43)

Borzi, A. 1892: )
1892
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