Note: In a survey of the genera of Nemastomataceae, Masuda & Guiry (1995: 66) segregated Schizymenia, Platoma, and (with uncertainty) Titanophora to their own family, Schizymeniaceae (Schmitz & Hauptfleisch) Masuda & Guiry, based on Nemastomataceae tribus Schizymenieae Schmitz & Hauptfleisch (1897k: 522, 523).
Platymenia apoda J. Agardh, 1848a: 47 (type locality: Table Bay, Cape Province, South Africa).
Schizymenia apoda (J. Agardh) J. Agardh, 1851 [1851–1863]: 175.
Taxonomic synonym:
Platymenia undulata J. Agardh var. obovata J. Agardh, 1848a: 47 (type locality: Table Bay, Cape Province, South Africa).
Schizymenia obovata (J. Agardh) J. Agardh, 1851 [1851–1863]: 175.—Grunow, 1867: 65.— Reichardt, 1871: 24.— Hemsley, 1884: 281.— Hauck, 1889 [1886–1889]: 188.— De Toni, 1905: 1650–1651.— Mazza, 1916 [1905–1918]: 46–48.— Lawson, 1980: 60.
INDIAN OCEAN DISTRIBUTION: St. Paul Island, Somalia.
Note: The nomenclature of this species was discussed by P. Silva (1980a: 142).