Amphiroa beauvoisii Lamouroux, 1816: 299–300 (type locality: Portugal).—Weber-van Bosse, 1904c: 100, pl. XIV: fig. 19.— Børgesen, 1943: 17–18.— Jaasund, 1976: 81, fig. 162.— Jaasund, 1977c: 419.— Lawson, 1980: 33.— Barratt et al., 1984: species list.— Bolton & Stegenga, 1987: 170.— Seagrief, 1988: 50, fig. 5:7.— R. Anderson & Stegenga, 1989: 302, 304.
Taxonomic synonym:
* Amphiroa exilis Harvey, 1849 [1847–1849]: 95–96 (syntype localities: Rio de Janeiro, Brazil; Algoa Bay, Cape Province, South Africa).—Kützing, 1858: 24, pl. 49: fig. II.— G. Martens, 1868: 84–85.— Barton, 1893: 203.
INDIAN OCEAN DISTRIBUTION: Mauritius, Oman, South Africa, Tanzania.
Note: The synonymy was proposed by Yendo (1905: 4).