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 Chlorogloea cf. novacekii Komárek & Montejano (1994: 6) (Figs. 10D–10E). Polarized, elongated colonies, 58.3–95.0 µm length. Sheath firm to diffluent, hyaline, conspicuous, non-lamellate, smooth. Cells spherical, 2.6–3.2 µm diam., to cylindrical 1.3–1.9 × 2.7–3.3 µm, arranged in rows. Cell content homogenous or 2–4 granules per cell, pale blue-green. Habitat: —Wet rocks. Notes: — Chlorogloea novacekii was described from a wet cave with a mean temperature lower than 20 °C ( Komárek & Montejano 1994 ), different than the environmental conditions found in the Atlantic Rainforest. Studied material: — BRAZIL . São Paulo : São Luís do Paraitinga , State Park of “Serra do Mar” ( Santa Virgínia ), 23º 20’ 16” S , 45º 9’ 1” W , 22 February 2010 , W.A. Gama-Jr. (SP 401418) .