Gloeocapsa nigrescens Nägeli

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 : 11

Gloeocapsa nigrescens Nägeli in Rabenhorst (1865: 40) ( Fig. 8I ).

Colonies round to elongated, 14.31–42.19 (66.66) µm wide.Without sub-colonies. Sheath firm, thin, slightly granulated, blackish. Cells densely to sparsely arranged, spherical, 2.55–7.93 µm wide. Individual envelopes firm, conspicuous, slightly granulated, blackish. Cell content homogenous to granulated, blue-green. Without cell in resisting stage.

Habitat:— Concrete.

Studied material:— PEUFR 55777

Figures

FIGURE 8. A–E. Asterocapsa divina—Different stages of the life cycle; F. Chondrocystis sp.; G. Chroococcus aff. heanogloios; H. Gloeocapsa compacta; I. Gloeocapsa nigrescens; J–K. Gloeocapsa novacekii—J. resting cells. L. Gloeocapsa stegophila; M. Gloeocapsa sp. 1; N. Gloeocapsa sp. 2; O–Q. Gloeocapsopsis dvorakii—O. familiares simplex stage; P. familiaris lamelosus stage; R. Gloeocapsopsis pleurocapsoides. Scale bar: 5 μm (A; B; J; R); 10 μm (to the others).