Chaetomorpha brachygona Harvey, 1858a: 87–88, pl. XLVI.A (syntype localities: Key West, Florida, U.S.A.; mouth of Rio Bravo [Rio Grande], border of Mexico and Texas, U.S.A.).—Durairatnam, 1961a: 20, pl. III: fig. 6 (`brachyona').— Thivy, 1961: 347.— Umamaheswara Rao & Sreeramulu, 1964: 600.— Sigee, 1966: 69.— Tsuda & Newhouse, 1966: 95.— S. Dixit, 1970: 105.— Umamaheswara Rao & Sreeramulu, 1970a: 25, fig. 2.— Rhyne, 1971: 51.— Islam, 1976: 12, pl. 2: fig. 19.— Hackett, 1977: 23.— Lawson, 1980: 7.— Moorjani, 1980b: 458, fig. 2.— Nair & Thampy, 1980: 278.— K. Krishnamurthy et al., 1982: table 1.— Blair, 1983: 192–195.— Untawale, Dhargalkar, & Agadi, 1983: [9].— Sartoni, 1992: 297–299, fig. 4D.
Misapplied name (fide Blair, pers. comm.):
Rhizoclonium tortuosum.—Blair, 1983: 199.
INDIAN OCEAN DISTRIBUTION: Bangladesh, Diego Garcia Atoll, India, Indonesia (Bali), Kenya, Maldives (Addu Atoll), Somalia, Sri Lanka.