Dichothrix spiralis Fritsch, 1918: 583, fig. 39 (type locality: South Africa).—Thajuddin & G. Subramanian, 1992b: 20–22, figs. 5, 6.
INDIAN OCEAN DISTRIBUTION: India.
Note: Drouet (1973: 127), on the basis of the original description, assigned this species to Calothrix parietina (Nägeli ex Kützing) Thuret.