Dolichospermum spiroides (Klebhan) Wacklin, Hoffmann & Komárek (2009)

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

Dolichospermum spiroides (Klebhan) Wacklin, Hoffmann & Komárek (2009) Fig. 17 A–D.

Basionym: Anabaena spiroides Klebahn (1895: 25)

Filaments solitary, planktonic; trichomes regularly screw-like coiled, coils 20–60 μm in diameter, constricted at the cross walls, not attenuated towards the ends; often with a broad, colourless mucilage. Vegetative cells spherical, compressed at the poles, dark blue-green in colour, (4.0–) 7.0–9.0 μm long × 6.0–8.5 μm broad, with aerotopes; apical cells undifferentiated. Heterocytes spherical, 7.0–10.0 μm in diameter. Akinetes intercalary, solitary or in series, oval to cylindrical with rounded ends, remote from the heterocytes, (11–) 15.0–21.0 μm long × 9.5–15.0 μm broad.

Specimens examined:—Atkinson Dam, Bokhara R. near Kirrima, Balonne R. at Weribone, Beardmore Dam, Bill Gunn Dam, Bjelke-Petersen Dam, Boondooma Dam, Bowen R. at Bowen R. Weir, Burdekin Falls Dam, Burnett R. at Ben Anderson Barrage, Burnett R. at Claude Wharton Weir, Burnett R. at Jones Weir, Burnett R. at Kirar Weir, Burnett R. at Ned Churchward Weir, Callide Dam, Cania Dam, Condamine R. at Chinchilla Weir, Coolmunda Dam, Culgoa R. at Woolerbilla, East Leichhardt Dam, Eungella Dam, Fairbairn Dam, Fitzroy R. at Bedford Weir, Fitzroy R. at Bingegang Weir, Fitzroy R. at Eden Bann Weir, Fitzroy R. at Glebe Weir, Fitzroy R. at Moura Weir, Fitzroy R. at Neville Hewitt Weir, Fitzroy R. at Tartrus Weir, Fitzroy R. at Theodore Weir, Fred Haigh Dam, Glenlyon Dam, Kinchant Dam, Kolan R. at Bucca Weir, Lake Clarendon, Leslie Dam, Maranoa R. at Woodlands, Maranoa R. at Jillambie Rd, Mary R. at Mary R. Barrage, Moogerah Dam, Moura offstream storage, Paradise Dam, Peter Faust Dam, Pioneer R. at Dumbleton Weir, Pioneer R. at Marian Weir, Pioneer R. at Mirani Weir, Six Mile Ck. at Bajool Weir, Teemburra Dam, Wuruma Dam.

Other records:— New South Wales: Lake Hume, Walker & Hillman (1977, 1982), Murrumbidgee R. at Balranald, Sullivan et al. (1988), River Murray at Murtho, Morgan, Swan Reach, Mannum, Woods Point, Hawkesbury R. at Sackville, Baker (1991), Murray R. at Moama, Humpage et al. (2013); Victoria: River Murray from Heywoods to Redcliffs, Sullivan et al. (1988); South Australia: Lake Alexandrina at Goolwa, Baker (1991).

Observations:—Cosmopolitan species, widespread, records from the plankton of reservoirs and weir pools throughout Australia.

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