Sphaerococcus fragilis C. Agardh, 1822 [1822–1823]: 253 (type locality: Cape of Good Hope, South Africa).
Chondrus fragilis (C. Agardh) Greville, 1830: lv.
Dicurella fragilis (C. Agardh) J. Agardh, 1852 [1851–1863]: 630–631 (including Indian Ocean record).—Hohenacker, 1855 [1852–1862]: no. 245.— J. Agardh, 1876: 406.— Barton, 1893: 143.— Stephenson, 1944: 350.— Stephenson, 1947: 303.— Searles, 1968: 69–73, figs. 30–32.
Trematocarpus fragilis (C. Agardh) De Toni, 1900: 417–418.—Simons, 1983: 805–806, figs. 6, 7 (var. fragilis).
Misapplied name (fide Papenfuss notes):
Gelidium fastigiatum.—Hohenacker, 1862 [1852–1862]: no. 561 (in part; see also Trematocarpus flabellatus).
INDIAN OCEAN DISTRIBUTION: South Africa.
Note: According to Simons (1983: 806), this species does not occur east of Cape Agulhas. Thus, Krauss's record from the mouth of the Knysna River is dubious.