Anabaena cylindrica Lemmermann (1896: 186)

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

Anabaena cylindrica Lemmermann (1896: 186) Fig. 36 A–B .

Filaments aggregated into fine mucilaginous mats. Trichomes flexuous to irregularly coiled, and variously entangled, constricted at the cross walls, not attenuated towards the ends. Vegetative cells isodiametric or up to 1.5 × longer than wide, 3.9–5.6 μm long × 3.4–4.6 μm wide; apical cells conically rounded. Heterocytes intercalary, spherical to cylindrical, 6.5–8.1 (–10.0) μm long × 4.3–5.5 μm wide. Akinetes cylindrical with rounded ends, solitary or up to five in series, located either side of the heterocytes, 2.5–4.5 × longer than wide, 16–25 (–31) μm long × 5.5–7.0 μm wide, exospore smooth, colourless.

Specimens examined:—Eurong Beach stream at Great Sandy Natl Park, Fraser Is. Section.

Other records:— New South Wales, Victoria: Sullivan et al. (1988).

Observations:—Growing along the edges of shallow coastal sandy streams and soaks. Widely distributed throughout the temperate zone where it has been observed as either periphytic on aquatic plants, or as part of the metaphyton (Komárek 2013).

Figures

FIGURE 36. A–B Anabaena cylindrica; C–D, G–H Anabaena oscillarioides; E–F Anabaena cf. augstumalis. Scale bars = 20 μm