Gloeocapsa nigrescens Nägeli

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 : 78-81

Gloeocapsa nigrescens Nägeli in Rabenhorst (1857: 629) ( Figs. 9B–9D ).

Round colonies, rarely elongated, 7.3–44.8 µm diam., 2–4–8–16 celled, rarely more. Sheath firm, hyaline to bluish or blackish, conspicuous, rarely lamellate, granulated. Cells spherical to slightly elongated, 3.2–5.4 µm diam. Cell content homogenous to sparsely granulated, blue-green to olive green. Spores elongated to irregular, dark-grey, roughly granulated, solitary or in pairs, 5.8–7.7 µm diam.

Habitat: —Dry and wet concrete walls.

FIGURES 8I–8J . Gloeocapsa compacta . 8I. Colony collected from a rock. 8J. Colony collected from a tree bark. FIGURES 9B–9D . Gloeocapsa nigrescens . 9B. General mature colony habit. 9C. Released spores. 9D. Spores inside the colony. FIGURES 9E–9G . Gloeocapsa novacekii . 9E– 9F. Variability of colonial morphology. 9G. Released spores.

FIGURES 9H–9I . Gloeocapsa punctata .

FIGURES 9J–9K . Gloeocapsa stegophila . 9J. General aspect of colonies found on rocks. 9K. General aspect of colonies found on tree barks. FIGURES 9L . Gloeocapsa sp. 1 .

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 401425) ; 23º 20’ 10” S, 45º 8’ 44” W, 24 February 2010 W.A. Gama-Jr. (SP 401435) ; Cananéia, State Park of “ Ilha do Cardoso ” (Perequê) , 25º 4’ 8” S, 47º 55’ 12.24” W, 29 June 2010, W.A. Gama-Jr. & C.F.S. Malone (SP 401438) ; 25º 4’ 8” S, 47º 55’ 12.24” W, 29 June 2010, W.A. Gama- Jr. & C.F.S. Malone (SP 401437) ; 25º 4’ 08” S, 47º 55’ 12.24” W, 29 June 2010, W.A. Gama-Jr. & C.F.S. Malone (SP 401440) 25º 5’ 8” S, 47º 55’ 30” W, 29 June 2010, W.A. Gama-Jr. & C.F.S. Malone (SP 401445) ; Peruíbe, Ecological Station “Juréia-Itatins” , 24° 26.420’ S, 47° 4.588’ W, 15 August 2011, W.A. Gama-Jr., G.S. Hentschke, C.F.S. Malone & C.L. Sant’Anna (SP 427305) ; 24° 23.013’ S, 47° 4.836’ W, 17 August 2011, W.A. Gama-Jr., G.S. Hentschke, C.F.S. Malone & C.L. Sant’Anna (SP 427324) 24° 22.739’ S, 47° 4.719’ W, W.A. Gama-Jr., G.S. Hentschke, C.F.S. Malone & C.L. Sant’Anna (SP 427333) .

Figures

FIGURES 8A–8C. Nephrococcus shilinensis. General colony habit and detail of reniform cells (arrows). FIGURES 8D–8E. Pseudocapsa dubia. General colony habit with colonies showing brown sheaths (arrow). FIGURES 8F–8G. Pseudocapsa sp. General colony habit and cells in fan disposition, which is typical from Pseudocapsa (arrow). FIGURE 8H. Chondrocystis dermochroa.

FIGURES 9A. Gloeocapsa compacta. Colony collected from a tree bark.