Polysiphonia spinifera Kützing, 1843b: 416 (type locality: Peru).
Pterosiphonia spinifera (Kützing) Ardré, 1967b: 37, 41, pl. III: fig. 3.—R. Norris & Aken, 1985: 62, figs. 26, 27.— Farrell, Critchley, & Aken, 1993: 152.
INDIAN OCEAN DISTRIBUTION: South Africa.
Note: Ardré (l.c.) accredited the combination Pterosiphonia spinifera to Falkenberg (1901: 268), but that author placed this species, as Polysiphonia spinifera, in the synonymy of Pterosiphonia dendroidea (Montagne) Falkenberg.