Myxosarcina 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 : 91

Myxosarcina sp. Printz (1921: 35) ( Figs. 15H–15K ).

Sarcinoid colonies, 20.3–48.4 µm diam., isolated or agglomerated. Sheath firm, hyaline, conspicuous, non-lamellate, smooth. Cells spherical, elliptical to polygonal, 6.3–13.0 µm diam. Baeocytes (many,>20 per cell) spherical to irregular, 2.7–3.7 µm diam. Cell content granulated, dark green to olive-green.

Habitat: —Wet rocks and concrete covered with plants.

Notes: —This morphotype was only found in culture. The studied population is similar to Myxosarcina decolorata ( Varma & Mitra 1962: 356) Komárek & Anagnostidis (1995: 21) . However they differ since M. decolorata has round cells, wider and wrinkled sheaths, and in the number of beocytes ( M. decolorata having 1–8).

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 427338); Peruíbe, Ecological Station “Juréia-Itatins”, 24° 23.311’ S, 47° 0.940’ W, 16 August 2011, W.A. Gama-Jr., G.S. Hentschke, C.F.S. Malone & C.L. Sant’Anna (SP 427303) .

Figures

FIGURES 15A–15D. Pleurocapsa sp. General colony habit and details of baeocytes (arrows). FIGURES 15E–15G. Chroococcidiopsis sp. General colony habit and details of baeocytes (arrows).