Dolichospermum smithii (Komárek) 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 smithii (Komárek) Wacklin, Hoffmann & Komárek (2009) Fig. 16 A–E.

Basionym: Anabaena solitaria f. smithii Komárek (1958)

Filaments solitary, planktonic; trichomes straight or flexuous, constricted at the cross walls, not attenuated towards the ends; often associated with a broad, hyaline mucilage. Vegetative cells spherical or depressed globose, dark blue-green in colour, with aerotopes, 8.5–12.0 μm in diameter; apical cells undifferentiated. Heterocytes solitary, spherical, 9.0–15.0 μm in diameter. Akinetes intercalary, solitary or up to 3 in series, spherical to broadly ovate, remote from the heterocytes, 15.0–28.0 μm in diameter.

Specimens examined:—Burdekin Falls Dam, Burnett R. at Claude Wharton Weir, Burnett R. at Kirar Weir, Burnett R. at Ned Churchward Weir, Coolmunda Dam, Fairbairn Dam, Fitzroy R. at Eden Bann Weir, Fitzroy R. at Tartrus Weir, Julius Dam, Kinchant Dam, Lake Clarendon, Mary R. at Mary R. Barrage, Pioneer R. at Dumbleton Weir, Pioneer R. at Marian Weir.

Other records:— South Australia: River Murray at Murtho, Wood’s Point, Warren Res., Baker (1991) .

Observations:—Cosmopolitan species, can be confused with D. planktonica which differ by the shape of mature akinetes.