Sargassum marginatum (C. Agardh) J. Agardh [var. marginatum] forma cannanorense Grunow, 1915 [1915–1916]: 396–397 (`cannamorensis') (type locality: Cannanore, Kerala, India).—K. Srinivasan, 1965: 243.— K. Srinivasan, 1967: 144, fig. 10.— V. Krishnamurthy & H. Joshi, 1970: 14.
INDIAN OCEAN DISTRIBUTION: India.
Note: Since the type locality is Cannanore, the epithet cannamorensis very likely represents a typographical error, correctable in accordance with Art. 60.1.