Callithamnion savianum Meneghini, 1840: [2] (type locality: Genova, Italy).
Acrochaetium savianum (Meneghini) Nägeli, 1862: 405, 414.—Basson, 1979: 69, pl. X: fig. 57.— Basson, 1992: 224.
Audouinella saviana (Meneghini) Woelkerling, 1973b: 560.—Woelkerling & Womersley, 1994: 47, figs. 7E–H.
Taxonomic synonyms:
Callithamnion pygmaeum Kützing, 1849: 640 (type locality: Adriatic Sea).—Dickie, 1874b: 197.— G. Murray, 1887: 22.
Chantransia efflorescens (J. Agardh) Kjellman var. thuretii Bornet, 1904: XVI–XVII, pl. I (session jubilaire): figs. 1–4 (type locality: near Cherbourg, Manche, France).
Audouinella thuretii (Bornet) Woelkerling, 1971: 36–37, figs. 12, 24.—Allender, 1981: 19, 20, 22.
INDIAN OCEAN DISTRIBUTION: Australia, Mauritius, Saudi Arabia, Sri Lanka.
Note: The conspecificity of Callithamnion savianum and C. pygmaeum was proposed by Ardissone (1883: 276–277). Chantransia efflorescens var. thuretii is included as a synonym on the authority of Woelkerling (1973b: 560).