Cyanostylon sp.

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 sp. ( Figs. 6F–6G ).

Dendroid, stratified, dense gelatinous colonies, 8–50 celled, often more. Mucilaginous stalks tubular, short, round to elliptical, simple, firm, hyaline to slightly brown and purple, conspicuous, lamellate, 8.0–9.5 × 3.1–7.5 µm. Cells spherical, (2.5)3.0–4.5 µm diam., 1–4 disposed at the stalk end. Cell content homogeneous, pale olive-green.

Habitat: —Wet rocks near a waterfall.

Notes: —This population is similar to Stilocapsa lilacina Xiu & H.X. Xiao (2004: 206) , mainly due to the coloration and structure of the colonies, and also the cell diameter. They differ in relation to the cell content and stalk diameter, which are respectively granulated and wider in S. lilacina (15.0–26.0 µm diam.). However, this species is invalidly published since the authors did not designate a type (as well as a habitat). Since Stilocapsa Ley (1947: 77) is synonymous to Cyanostylon Geitler (1928a: 441) , we maintained the Atlantic Rainforest population as Cyanostylon sp.

Studied material: — BRAZIL. São Paulo: Peruíbe, Ecological Station “Juréia-Itatins”, 24° 23.708’ S, 47° 7.324’ W, 17 August 2011, W.A. Gama-Jr., G.S. Hentschke, C.F.S. Malone & C.L. Sant’Anna (SP 427330); 24° 23.703’ S, 47° 7.330’ W, 17 August 2011, W.A. Gama-Jr., G.S. Hentschke, C.F.S. Malone & C.L. Sant’Anna (SP 427331) .

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).