Callithamnion multifidum Harvey, 1855b: 562 (type locality: Rottnest Island, Western Australia).—Harvey, 1863: liii.— J. Agardh, 1876: 40.— Sonder, 1880: 10.— De Toni, 1903: 1329.— Lucas, 1909: 49.— Lucas & Perrin, 1947: 332.— Huisman & Walker, 1990: 420.
INDIAN OCEAN DISTRIBUTION: Australia.