Polysiphonia incompta Harvey, 1847 [1847–1849]: 44 (type locality: near Muizenberg, False Bay, Cape Province, South Africa).—Kylin, 1938: 17–18.— Eyre, Broekhuysen, & Crichton, 1938: 93, 101.— Stephenson, Stephenson, & Bright, 1938: 18.— Stephenson, 1944: 313.— Stephenson, 1947: 307.— Day, Millard, & Harrison, 1952: 413.— Pocock, 1958: 27.— Seagrief, 1967: 118, pl. [51].— Papenfuss, 1968b: 278.— Seagrief, 1980: 27, fig. on pl. 12.— Day, 1981: 96.— Bolton, 1986: 254.— Bolton & Stegenga, 1987: 177.— Seagrief, 1988: 66, fig. 5:15.— R. Anderson & Stegenga, 1989: 304.— Bolton & Stegenga, 1990: 237.— Farrell, Critchley, & Aken, 1993: 152.
Misapplied names (fide Papenfuss, 1968b: 278):
Polysiphonia sertularioides.—Barton, 1896: 198.— Delf & Michell, 1921: 113.
Polysiphonia urceolata.—Delf & Michell, 1921: 113.
INDIAN OCEAN DISTRIBUTION: Mozambique, South Africa.