Agarum clathratum Dumortier, 1822: 102.
Fucus agarum S. Gmelin, 1768: 210 (syntype localities: "Oceanus Indiae orientalis et mare Kamtschaticum'').
Note: This species, whose nomenclature was discussed by P. Silva (1991), is a well-known member of the North Pacific flora and undoubtedly does not occur in the Indian Ocean.