Ectocarpus terminalis Kützing, 1845: 236 (type locality: Helgoland, Germany).
Hecatonema terminale (Kützing) Kylin, 1937a: 8–9, fig. 2.—Børgesen, 1941: 6.— K. Srinivasan, 1965: 242.— S. Dixit, 1966: 7.— Misra, 1966b: 103, fig. 51.— Misra, 1967: 232.— V. Krishnamurthy & H. Joshi, 1970: 12.— S. Dixit, 1980: 66.— M. Balakrishnan & Kinkar, 1981: 21–22, figs. 23, 109, 110.— Untawale, Dhargalkar, & Agadi, 1983: [18].
INDIAN OCEAN DISTRIBUTION: India.