Polysiphonia falcata Kützing, 1863a: 12, pl. 34: figs. a–c (type locality: Cape of Good Hope, South Africa).
Herposiphonia ? falcata (Kützing) De Toni, 1903: 1060.—R. Anderson & Stegenga, 1989: 303, 304, 305.
INDIAN OCEAN DISTRIBUTION: South Africa.