Ulva rugosa Linnaeus, 1771: 311 (type locality: Cape of Good Hope, South Africa).
Splachnidium rugosum (Linnaeus) Greville, 1830: xxxvi.—Krauss, 1846: 213.— G. Martens, 1868: 70–71.— Mitchell & Whitting, 1892: 1–10, pls. I–III.— Barton, 1893: 84.— Kjellman, 1893a: 280, fig. 181B.— Reinbold, 1908: 188–189.— Delf & Michell, 1921: 99.— Kuckuck, 1929: 77–80, figs. 110–114.— Stephenson, Stephenson, & du Toit, 1937: 355, 361, 363, 373, pl. XXI: fig. 2.— Stephenson, 1944: 307, 349.— Stephenson, 1947: 300.— Delépine, 1963a: 9–10.— Delépine, 1963b: 18.— Delépine, 1966: 56.— I. Price & Ducker, 1966: 261–273, figs. 1–3.— Seagrief, 1967: 58, pl. [22].— Simons, 1969: 252, fig. (s.n.).— Seagrief, 1977: 90.— Simons, 1977: 24, fig. 52.— Brown & Jarman, 1978: 1259.— Bolton, 1986: 253.— Seagrief, 1988: 46, fig. 5:5.— Wynne & Scott, 1989: 25.— Bolton & Stegenga, 1990: 237.— Branch et al., 1994: 320, pl. 152.4.
INDIAN OCEAN DISTRIBUTION: Amsterdam Island, South Africa.