Hypnea tenuis Kylin, 1938: 11–12, fig. 5 (type locality: Isipingo Beach, near Durban, South Africa).—Stephenson, 1947: 306.— Pocock, 1958: 26.— Seagrief, 1977: 90.— Seagrief, 1980: 26, fig. on pl. 9.— Lambert & Steinke, 1986a: 54.— Lambert & Steinke, 1986b: 211, 213, 216.— Bolton & Stegenga, 1987: 175.— Seagrief, 1988: 58, fig. 5:11.— Bolton & Stegenga, 1990: 237.— Farrell, Critchley, & Aken, 1993: 153.— Farrell et al., 1994: 280.
INDIAN OCEAN DISTRIBUTION: Mozambique, South Africa.