Polysiphonia villum J. Agardh, 1863 [1851–1863]: 941 (type locality: "ad littus Americae tropicae'' [Mexico]).
Lophosiphonia villum (J. Agardh) Setchell & Gardner, 1903: 329–330.—Sigee, 1966: 74.— Tsuda & Newhouse, 1966: 100.— Rhyne, 1971: 62.— Basson, 1979: 79, pl. XVI: fig. 92.— McCain, 1984: 98.— Kalugina-Gutnik, Perestenko, & Titlyanova, 1992: 21 (table 1).— Titlyanova, Perestenko, & Kalugina-Gutnik, 1992: 44.— Zvyagintsev & Ivin, 1992: tables 2, 5.
Polysiphonia scopulorum Harvey var. villum (J. Agardh) Hollenberg, 1968a: 81, 83 (including Indian Ocean record).—Hackett, 1977: 21.— R. Anderson & Stegenga, 1989: 304, 309–310.— Basson, Mohamed, & Arora, 1989: 39.— Basson, 1992: 227.
INDIAN OCEAN DISTRIBUTION: Aldabra Islands, Bahrain, Diego Garcia Atoll, Maldives, Saudi Arabia, Seychelles.