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