Sargassum heteromorphum J. Agardh, 1873: 60 (type locality: Georgetown, Tasmania fide Womersley, 1954b: 345).—Womersley, 1954b: 345–346, fig. 1c, pl. 2: fig. 2.— Womersley, 1987: 421–422.— Huisman & Walker, 1990: 384.
Taxonomic synonym:
Sargassum halitrichum J. Agardh, 1889: 43, pl. XIII (syntype localities: southern and western Australia).—De Toni, 1895b: 9.— Lucas, 1909: 9.— Grunow, 1915 [1915–1916]: 332.
INDIAN OCEAN DISTRIBUTION: Australia.
Note: The synonymy was proposed by Womersley (1954b: 345–346).