Sargassum glaucescens J. Agardh, 1848b: 306 (type locality: Macau).—Biswas & Sharma, 1950: 87, pl. 1: fig. 2.— K. Srinivasan, 1967: 143.— H. Burkill, Greenwood-Barton, & Crowther, 1968: 433, tables III, IV, VI.— S. Dixit, 1968: 18.— V. Krishnamurthy & H. Joshi, 1970: 14.— Untawale, Dhargalkar, & Agadi, 1983: [23].— Ho, Phang, & Pang, 1995: 274.
Taxonomic synonym:
Sargassum ornatum Greville, 1848 [1848–1849]: 205, pl. IV: lower right figs. 1–4 (type locality: "China Sea (?)'' [Macau fide Tseng & Lu, 1988: 35]) Untawale, Dhargalkar, & Agadi, 1983: [23].
INDIAN OCEAN DISTRIBUTION: Andaman Islands, India, Nicobar Islands, Singapore.
Note: The synonymy was proposed by Tseng & Lu (1988: 35).