Cylindrospermum sp. A

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

Cylindrospermum sp. A Fig. 45 A–G.

Trichomes flexuous, solitary, amongst other algae, not typically aggregated into defined mats or strata, distinctly and deeply constricted at the cross walls, pale blue-green in colour. Vegetative cells short barrel-shaped, 1.4–2.4 μm long × 2.2–2.8 μm wide. Heterocytes conically rounded, 3–4 μm long × 2–2.4 μm wide. Mature akinetes not observed.

Specimens examined:—Amity Swamp, North Stradbroke Is., Rainbow Beach Fens, Great Sandy Natl Park, Cooloola Section.

Observations:—Growing in the metaphyton of shallow, peaty wetlands amongst other algae and emergent vegetation from several locations in SE Queensland. Mature akinetes were not observed. Compare with C. breve Welsh (after Komárek 1989, Komárek et al. 2017).

Other species known from Australia: C. majus , One Mile Ck, Ipswich, Queensland, A.B. Cribb, 1948 (BRI 0700612); C. punctatum, Mimosa Ck, Blackdown Tableland , Queensland, A.B. Cribb, 1974 (BRI 0700613). C. alatosporum , Northern Territory, Thomasson (1986); C. ecballiisporum , Northern Territory, Thomasson (1986); C. goetzei, Lismore , New South Wales, Playfair (1918); C. minutissimum, SE Queensland, McLeod (1975); C. punctatum Queensland, Cribb (1976); C. rectangulare Northern Territory, Playfair (1915, 1917, 1918); C. indentatum , Queensland, Ling & Tyler (2000).

MACROSPERMUM