How diverse are coccoid cyanobacteria? A case study of terrestrial habitats from the Atlantic Rainforest (São Paulo, Brazil) Author Jr, Watson Arantes Gama Institute of Botany, Núcleo de Pesquisa em Ficologia, C. P. 3005, 1031 - 970 São Paulo, SP, Brazil & E-mail: watsonarantes @ gmail. com (corresponding author) Author Iv, Haywood Dail Laughinghouse Department of Biological Sciences, Smith College, Northampton, MA 01063, USA & Department of Botany, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013, USA Author Sant’Anna, Célia Leite Institute of Botany, Núcleo de Pesquisa em Ficologia, C. P. 3005, 1031 - 970 São Paulo, SP, Brazil text Phytotaxa 2014 2014-09-12 178 2 61 97 http://dx.doi.org/10.11646/phytotaxa.178.2.1 journal article 10.11646/phytotaxa.178.2.1 1179-3163 5145178 Cyanostylon gelatinosus Azevedo & Sant’Anna (1994a: 76) ( Figs. 6A–6D ). Dendroid to irregular, dense gelatinous colonies, 3–50 celled, to more. Mucilaginous stalks tubular, round to elliptical, branched, firm, hyaline, conspicuous, lamellate, 5.7–8.4 µm diam. Cells spherical, (1.2)1.5–2.7(3.2) µm diam., 1–2 disposed at the stalk end. Cell content homogeneous, blue-green. Habitat: —Cave wet walls. Studied material :— BRAZIL . São Paulo : Ubatuba , “Sununga” Beach (Gruta-que-chora), 23° 31’ S , 45° 8’ W , 12 April 2003 , M. T . Fujii et al. (SP 401448) . FIGURES 5A–5B . Chroococcus tenax . 5A. General colony habit highlighting the lamellated sheaths. 5B. Desiccated cell showing concentrically lamellate sheaths and blue color. FIGURE 5C . Chroococcus varius FIGURES 5D–5E . Chroococcus cf. minor . 5E. Colony sheath highlighted by China ink. FIGURES 5F–5G . Chroococcus cf. turgidus FIGURES 5H–5I . Chroococcus cf. varius . General colony habit and detail of a colony dyed with methylene blue solution, highlighting the lamellate sheath. FIGURES 5J– 5L . Cyanosarcina sp. 5 J. Detail of cell in a successive division (arrow). 5K. Cell after consecutive divisions—‘giant cell’. 5L. General colony habit, Chroococcus -like.