Sarcomenia hypneoides Harvey, 1855b: 537 (syntype localities: Garden Island and Fremantle, Western Australia).—Harvey, 1858b: pl. XII.— J. Agardh, 1863 [1851–1863]: 1266.— Harvey, 1863: xvii.— Sonder, 1880: 33.— J. Agardh, 1899: 143–144.— De Toni, 1900: 741–742.— Mazza, 1908 [1905–1918]: 157–158.— Lucas, 1909: 37.— De Toni, 1924: 360.— Womersley & Shepley, 1959: 185–187, figs. 51–54, pl. 3: fig. 1.
Platysiphonia hypneoides (Harvey) Womersley & Shepley, 1959: 209.—V. May, 1965: 378.— Huisman & Walker, 1990: 431.
INDIAN OCEAN DISTRIBUTION: Australia.