Gelidium caespitosum Kylin, 1938: 8, figs. 2E–H (type locality: Isipingo Beach, near Durban, South Africa).—Stephenson, 1947: 303.— Isaac, 1956a: 183–184, fig. 16.— Isaac, 1957b: 93.— Pocock, 1958: 26.— Isaac, 1967: 79.— Lawson, 1980: 45.— Seagrief, 1980: 24.— Bolton & Stegenga, 1987: 174.— Seagrief, 1988: 50, fig. 5:17.— R. Norris, 1992d: 11–13, figs. 3, 4.— Farrell, Critchley, & Aken, 1993: 153.— Felicini & Perrone, 1994: 299.
Pterocladia caespitosa (Kylin) R. Norris, 1987b: 42, figs. 6–8 (`caespitosum').—Huisman, 1993: 15–16.— Wynne, 1995: 266, fig. 5.
INDIAN OCEAN DISTRIBUTION: Australia, Kenya, Mozambique, Seychelles (Mahé Island), South Africa.
Note: The transfer of this species to Pterocladia was based on the observation of unilocular cystocarps and catenate carposporangia.