Lithothamnion erubescens Foslie, 1900a: 9 (type locality: Chaloup Bay, Fernando de Noronha).—Pilger, 1908b: 41.— Schröder, 1912: 303.— Purchon & Enoch, 1954: 58.— Adey & Lebednik, 1967: 79–80.— Sivalingam, 1977b: 206.— Pichon, 1978: 175, 304, 416.— Lawson, 1980: 56.— Untawale, Dhargalkar, & Agadi, 1983: [39].— Phang & Wee, 1991: 58.
Mesophyllum erubescens (Foslie) Lemoine, 1928: 252.—Isaac, 1971: 17.— Lawson, 1980: 57.— Segonzac, 1983: table 1.— Segonzac, 1984: table 1.— Keats & Chamberlain, 1994b: 175–181, figs. 1–42, 59–64.— Verheij, 1994: 121–122.— Ballesteros & Afonso-Carrillo, 1995: 209, fig. 11.
Taxonomic synonym (fide Keats & Chamberlain, 1994b: 179–180):
* Lithothamnion erubescens Foslie forma madagascarense Foslie, 1901e: 3–4 (`madagascarensis') (type locality: Madagascar).—Hariot, 1902: 472.— De Toni, 1905: 1737–1738.— Woelkerling, 1993: 142.
Lithothamnion madagascarense (Foslie) Foslie, 1906a: 19 (`madagascariense').—Svedelius, 1906b: 189.— De Toni, 1924: 636.— Foslie, 1929: 43, pl. XIV: fig. 15.— Adey & Lebednik, 1967: 80.
Mesophyllum madagascarense (Foslie) Adey, 1970: 25 (`madagascariensis').
INDIAN OCEAN DISTRIBUTION: Cocos [Keeling] Island, India, Kenya, Madagascar, Malaysia, Mauritius, Singapore, South Africa, Sri Lanka, Tanzania.