Sargassum fresenianum J. Agardh var. steudneri Grunow, 1915 [1915–1916]: 432 (type locality: "in sinu Persico, Manala Dalak'').
INDIAN OCEAN DISTRIBUTION: uncertain.
Note: According to Vegter (1986: 954), H. Steudner collected algae at Massawa, Eritrea, opposite the Dahlak Archipelago. It seems probable, therefore, that the Red Sea rather than the Persian Gulf is the provenance of the type of Sargassum fresenianum var. steudneri.