Ceramium fimbriatum Setchell & Gardner, 1924a: 777, pl. 26: figs. 43, 44 (type locality: near La Paz, Baja California Sur, Mexico).—Sigee, 1966: 72.— Tsuda & Newhouse, 1966: 98.— Umamaheswara Rao, 1969d: 46.— Umamaheswara Rao & Sreeramulu, 1970a: 42, fig. 61.— Hackett, 1977: 14.— V. Krishnamurthy & Thomas, 1977: 46, 49.— B. Rao & Sundari, 1977: 88–89, figs. 1, 2.— Sundari & B. Rao, 1977: 461–462.— B. Rao, Sundari, & Umamaheswara Rao, 1978: 123, 124, 127–128, figs. 1–4, 8–10, 13, table I.— S. Dixit, 1980: 76.— Sundari, B. Rao, & Umamaheswara Rao, 1980: 306 ff., fig. 5, pl. I: figs. 1, 4, pl. II: figs. 7–13, table 1.— Untawale, Dhargalkar, & Agadi, 1983: [35].— Nair et al., 1986: 737.— G. Rao & Umamaheswara Rao, 1986: 103.— Kalugina-Gutnik, Perestenko, & Titlyanova, 1992: 20 (table 1).— Titlyanova, Perestenko, & Kalugina-Gutnik, 1992: 43.— Nair et al., 1993: 185, 193.— Wynne, 1995: 292, fig. 37.
INDIAN OCEAN DISTRIBUTION: India, Maldives, Seychelles.
Note: Womersley (1978: 234, 237) regarded Ceramium fimbriatum as a synonym of C. flaccidum (Kützing) Ardissone, a name that he applied to a species that was said to be widespread in cold temperate to tropical waters. Working with Indian material, Sundari, B. Rao, & Umamaheswara Rao (1980) determined the chromosome number of C. fimbriatum to be 2n = 42, while a high level of polyploidy (2n = 84 or more) was found in C. gracillimum var. byssoideum Mazoyer, which had also been assigned to C. flaccidum by Womersley (l.c.).