Platymenia carnosa J. Agardh, 1848a: 48 (type locality: "Van Kampsbay'' [Camps Bay], Cape of Good Hope, South Africa).
Iridaea carnosa (J. Agardh) Kützing, 1849: 729.—Hohenacker, 1860 [1852–1862]: no. 372 (in part; see also Pachymenia cornea).
Pachymenia carnosa (J. Agardh) J. Agardh, 1876: 145.—Barton, 1893: 139 (Cape Agulhas records, in part; see also Pachymenia cornea).— Mazza, 1914 [1905–1918]: 142–143.— Stephenson, 1944: 351.— Stephenson, 1947: 307.— Simons, 1969: 261, fig. (s.n.).— Simons, 1977: 46, fig. 133.— Simons & Hewitt, 1977: 21–23, 25, figs. 24–29, 37.
INDIAN OCEAN DISTRIBUTION: South Africa.