Spyridia ? pellucida Harvey, 1844c: 449–450 (type locality: Georgetown, Tasmania).
Macrothamnion pellucidum (Harvey) Wollaston, 1968: 329–333, fig. 25 (including Indian Ocean record).
Taxonomic synonym:
Callithamnion mucronatum J. Agardh, 1851 [1851–1863]: 29 (type locality: Tasmania).—Harvey, 1863: liii.— J. Agardh, 1876: 19.
Antithamnion mucronatum (J. Agardh) Nägeli, 1862: 146.—De Toni, 1903: 1410.— Lucas, 1909: 51.— Lucas & Perrin, 1947: 355.
INDIAN OCEAN DISTRIBUTION: Australia.
Note: The synonymy was proposed by Wollaston (l.c.).