Scytonema cf. sanpaulense

Mcgregor, Glenn B., 2018, Freshwater Cyanobacteria of North-Eastern Australia: 3. Nostocales, Phytotaxa 359 (1), pp. 448-450 : 448-450

Scytonema cf. sanpaulense Sant’Anna (1988: 530) Fig. 76 A–G.

Thallus flocculose, or forming irregular clusters amongst other algae. Filaments 11–12.4 μm wide, with geminate false-branching; branches the same morphology as the main filaments. Sheath, colourless and slightly parallely lamellated, often closed at the ends. Trichomes cylindrical, slightly constricted at the cross walls. Vegetative shorter than broad, 3.3–8.7 μm long × 7.1–9.3 μm wide; apical cells widely rounded. Heterocytes ± spherical, barrel-shaped to cylindrical, 10.2–18.2 μm long × 8.7–10.6 μm wide.

Specimens examined:—Maloney Springs.

Observations:—Growing amongst other filamentous algae and emergent aquatic plants in a shallow tropical wetland.