Halymenia dilatata Zanardini, 1851: 35 (type locality: Red Sea).—Hauck, 1888 [1886–1889]: 87.— J. Agardh, 1892: 53.— Børgesen, 1938b: 214.— S. Dixit, 1940a: 97, fig. 5.— S. Dixit, 1941: 127.— K. Srinivasan, 1960c: 458.— M. Balakrishnan, 1961a: 86–88, 90.— M. Balakrishnan, 1961c: 197–202, figs. 20–27.— Durairatnam, 1961a: 54.— S. Dixit, 1966: 14.— Umamaheswara Rao, 1969d: 44.— V. Krishnamurthy & H. Joshi, 1970: 20.— Jaasund, 1979: 9.— Lawson, 1980: 49.— Untawale, Dhargalkar, & Agadi, 1983: [30].— R. Norris & Aken, 1985: 56, figs. 1, 2.— Desikachary, V. Krishnamurthy, & M. Balakrishnan, 1990: 249–250, fig. 49.— Subba Rao et al., 1992: 182.
Sebdenia dilatata (Zanardini) De Toni, 1900: 531.
INDIAN OCEAN DISTRIBUTION: India, Somalia, South Africa, Sri Lanka, Tanzania.