Conferva radicans Dillwyn, 1809 [1802–1809]: 57–58, suppl. pl. C (lectotype locality: Bantry Bay, Ireland fide Prud'homme van Reine, 1982: 62, 71).
Sphacelaria radicans (Dillwyn) Harvey, 1833: 324.—G. Martens, 1868: 23, 68–69.— De Wildeman, 1897a: 165.
INDIAN OCEAN DISTRIBUTION: Indonesia (Sumatra).