Pleurocapsa cf. aurantiaca Geitler (1932: 354)

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 : 89-90

Pleurocapsa cf. aurantiaca Geitler (1932: 354) ( Figs. 14E–14G ).

Polarized, fasciculate colonies, with cells densely packed. Cells hemispherical to elliptical, 3.8–6.8 µm diam. Pseudofilaments dichotomous, biseriate, 5–17 celled, 20.2–59.2 × 8.4–13.4 µm. Sheath firm, yellow to dark brown, conspicuous, non-lamellate, smooth. Baeocytes not observed. Cell content homogenous, blue-green to green brownish.

Habitat: —Rocks covered by a water slide.

Notes: —Despite baeocytes not being found, colonial arrangement was typical of Pleurocapsa . The population described resembles Pleurocapsa aurantiaca in relation to habitat and colonial morphology. However, this species has larger cell diameter and orange/red sheaths.

Studied material: — BRAZIL. São Paulo: Peruíbe, Ecological Station “Juréia-Itatins”, 24° 22.783’ S, 47° 1.287’ W, 16 August 2011, W.A. Gama-Jr., G.S. Hentschke, C.F.S. Malone & C.L. Sant’Anna (SP 427312) .

FIGURES 14E–14G . Pleurocapsa cf. aurantiaca

Figures

FIGURES 14A–14B. Chamaesiphon stratosus. Cell arrangement and initial stage after exospore germination (arrow). FIGURES 14C–14D. Hyella cf. caespitosa var. arbuscula. General thallus aspect and detail of baeocytes in mothers’ sheath (arrow).