Note: This genus has recently been monographed by Komárek et al. (1993).
Spermosira harveyana Thwaites in Harvey, 1848 [1846–1851]: pl. CLXXIII.C (type locality: Shirehampton, near Bristol, England).
Nodularia harveyana (Thwaites) Thuret, 1875: 378.—De Wildeman, 1900: 28.— Reinbold, 1907: 552.— Whitton & Potts, 1979b: 3, 5.
INDIAN OCEAN DISTRIBUTION: Aldabra Islands, Seychelles.
Note: Drouet (1978: 123, 128), after examining a representative of the type collection (in PC), assigned this species to Nostoc spumigena (Mertens) Drouet.