Polysiphonia simpliciuscula P. Crouan & H. Crouan, 1852: no. 302 (type locality: Anse du Minou, Finistère, France).
Ophidocladus simpliciusculus (P. Crouan & H. Crouan) Falkenberg in Schmitz & Falkenberg, 1897: 461.—Saenger, 1971: 291–304, figs. 1–8, table 1.— Saenger, 1974: 26.— Seagrief, 1980: 27, fig. on pl. 12.— Bolton & Stegenga, 1987: 177, fig. 5e.— Seagrief, 1988: 68, fig. 5:16.— R. Anderson & Stegenga, 1989: 303, 305.— Farrell, Critchley, & Aken, 1993: 152.— Wynne, 1995: 315, fig. 79.
INDIAN OCEAN DISTRIBUTION: Mozambique, Seychelles (Mahé Island), South Africa.