Spirulina tenuissima Kützing, 1836a: [no. 1] (type locality: Trieste, Italy).—Hauck, 1888 [1886–1889]: 93.
INDIAN OCEAN DISTRIBUTION: Madagascar.
Note: Drouet (1968: 17, 20), after examining the holotype of this species (in L) assigned it to Spirulina subsalsa Oersted.