Gigartina disticha Sonder, 1845: 55 (type locality: Western Australia [Busselton fide Edyvane & Womersley, 1994: 310]).—Sonder, 1848 [1846–1848]: 175.— Kützing, 1849: 750.— J. Agardh, 1851 [1851–1863]: 269–270.— Harvey, 1855b: 555.— Harvey, 1863: xliii, pl. CCXCVII.— Kützing, 1869: 7, pl. 18: figs. a, b.— J. Agardh, 1876: 194–195.— Sonder, 1880: 14.— De Toni, 1897: 208–209.— Lucas, 1909: 24.— Lucas & Perrin, 1947: 150, fig. 22.— Huisman & Walker, 1990: 405.— Hommersand et al., 1993: 118.— Edyvane & Womersley, 1994: 310, 312.
Mammillaria disticha (Sonder) Kuntze, 1891: 903.
INDIAN OCEAN DISTRIBUTION: Australia.