Amphibolis filiformis Suhr, 1834: 737–738, pl. II: fig. 13 (type locality: Algoa Bay, Cape Province, South Africa).—Drège, 1843: 154 (`Omphibolus').
Caulerpa filiformis (Suhr) Hering, 1841: 91 (including Indian Ocean record).—Krauss, 1846: 214.— Areschoug, 1850a: no. 28.— Areschoug, 1851: 6–7.— Papenfuss, 1940a: 201–203, fig. 2.— Stephenson, 1944: 349.— Stephenson, 1947: 295.— Isaac, 1953: 63, 66.— Millard & Harrison, 1954: 175.— Isaac, 1957b: 78–79.— Seagrief, 1967: 18, pl. [3].— W.R. Taylor, 1967: 48.— Simons, 1969: 244, fig. (s.n.).— Jackson, 1976: 20, 24, 32.— Seagrief, 1977: 74, 90.— Simons, 1977: 14, fig. 10.— Brown & Jarman, 1978: 1256, 1257, 1259.— Joubert & Hanekom, 1980: appendices 1, 3.— Seagrief, 1980: 21, fig. on pl. 1.— Bolton, 1986: 254.— Lambert & Steinke, 1986b: 213.— Bolton & Stegenga, 1987: 168.— Seagrief, 1988: 37, 40, fig. 5:2.— Bolton & Stegenga, 1990: 234, 236.— Adams, Knoop, & Bate, 1992: 218, 220, fig. 5.— Farrell, Critchley, & Aken, 1993: 148.— Branch et al., 1994: 310, pl. 147.4.
Himandactylius filiformis (Suhr) Trevisan, 1849a: 134–135.
Caulerpa ligulata Harvey ex J. Agardh, 1873: 10, nom. illeg. (including Indian Ocean record).—De Toni, 1889: 447.— Barton, 1893: 81–82.— Delf & Michell, 1921: 95.— Stephenson, Stephenson, & du Toit, 1937: 355, 362, 372.— Eyre, Broekhuysen, & Crichton, 1938: 89, 92, 100, 107.— Eyre & Stephenson, 1938: 28, 29, 32.— Stephenson, Stephenson, & Bright, 1938: 4, 12.— Stephenson, 1939: 533.— Stephenson, 1944: 302, 311, 314, 317.
Caulerpa flagelliformis C. Agardh forma ligulata Weber-van Bosse, 1898: 273–276, pl. XXIV: fig. 7 (including Indian Ocean record).
Misapplied names (fide Papenfuss, 1940a: 201–203):
Caulerpa flagelliformis.—Kützing, 1843b: 308.— Weber-van Bosse, 1898: 274 (in part), pl. XXIV: fig. 8 ("forma typica'').
Phyllerpa flagelliformis.—Kützing, 1857: 2, pl. 2: fig. II.— Hohenacker, 1862 [1852–1862]: no. 480.
INDIAN OCEAN DISTRIBUTION: Mozambique, South Africa.
Note: Caulerpa ligulata is an illegitimate substitute name for C. filiformis.