Lithothamnion lenormandii (Areschoug) Foslie forma australe Foslie, 1901a: 8 (`australis') (type locality: Half Moon Bay, Port Phillip Bay, Victoria, Australia).
Lithothamnion repandum Foslie, 1904b: 4.
Phymatolithon repandum (Foslie) Wilks & Woelkerling, 1994: 190–192.
Taxonomic synonym (fide Wilks & Woelkerling, 1994: 191):
Lithothamnion repandum Foslie forma asperulum Foslie, 1906b: 5 (`asperula') (type locality: Bay of Islands, New Zealand).
Lithothamnion asperulum (Foslie) Foslie, 1907b: 6, nom. illeg.—Segonzac, 1983: table 1.— Segonzac, 1984: 99, pl. 2: fig. 5, table 1.
INDIAN OCEAN DISTRIBUTION: Australia, Mauritius, Seychelles.
Note: When Foslie (1904b: 4) elevated Lithothamnion lenormandii forma australe to specific rank, he was obligated to propose a new epithet (repandum) in view of the prior existence of L. australe Foslie.