Cyanostylon cf. gelatinosus Azevedo & Sant’Anna (1994a: 76)

Jr, Watson Arantes Gama, Iv, Haywood Dail Laughinghouse & Sant’Anna, Célia Leite, 2014, How diverse are coccoid cyanobacteria? A case study of terrestrial habitats from the Atlantic Rainforest (São Paulo, Brazil), Phytotaxa 178 (2), pp. 61-97 : 74

Cyanostylon cf. gelatinosus Azevedo & Sant’Anna (1994a: 76) ( Fig. 6E ).

Dendroid, dense gelatinous colonies, 3–30 celled, rarely more. Mucilaginous stalks tubular, round to elliptical, simple, firm, hyaline to slightly brown, conspicuous, lamellate, 3.1–7.5 µm diam. Cells spherical, 1.7–2.4 µm diam., 1–2 disposed at the stalk end. Cell content homogeneous, pale blue-green.

Habitat: —Concrete wet walls.

Notes: — Cyanostylon gelatinosus was described from caves at the seafront, different from the habitat where the present population was found, which is on concrete directly exposed to sunlight near the forest. Despite the habitat, they are morphologically similar, except for stalk color, which can be brown in C. cf. gelatinosus and is always hyaline in C. gelatinosus (Azevedo & Sant’Anna 1994).

Studied material:— BRAZIL. São Paulo: São Luís do Paraitinga, State Park of “Serra do Mar” ( Santa Virgínia ), 23º 20’ 36” S, 45º 7’ 44” W, 24 February 2010, W.A. Gama-Jr. (SP 401423) .

Figures

FIGURES 6A–6D. Cyanostylon gelatinosus. 6C. Cells detail. 6D. Mucilage stalk detail. FIGURE 6E. Cyanostylon cf. gelatinosus. General colony habit with detail of mucilage stalks (arrows). FIGURES 6F–6G. Cyanostylon sp. 6G. Mucilage stalk detail (arrow). FIGURES 6H–6I. Endospora rubra. General colony habit with cell packets showing individual envelopes (arrows).