Amphiroa rigida Lamouroux, 1816: 297, pl. XI: fig. 1 (type locality: Mediterranean Sea).—Harvey, 1857a: no. 22.— Montagne & Millardet, 1862: 14–15.— G. Martens, 1868: 84–85.— G. Murray, 1887: 33.— Schröder, 1912: 303.— Durairatnam, 1961a: 51.— S. Dixit, 1970: 118.— Jaasund, 1976: 79, fig. 159.— Jaasund, 1977c: 419.— Seagrief, 1977: 90.— Knutzen & Jaasund, 1979: 3.— Lawson, 1980: 34.— Gopinathan & Panigrahy, 1983: 51.— Teo & Wee, 1983: 88, fig. 89.— Untawale & Jagtap, 1984: 101 (table 1).— Jagtap, 1985a: 47.— Seagrief, 1988: 50, fig. 5:7.— Phang & Wee, 1991: 58.— Coppejans, Beeckman, & De Wit, 1992: 64.— Jagtap, 1992: 57.— Farrell, Critchley, & Aken, 1993: 152.— Jagtap, 1993: table I.— Naim, 1993: 142.
INDIAN OCEAN DISTRIBUTION: Andaman Islands, Kenya, Laccadive Islands, Mauritius, Nicobar Islands, Réunion, Singapore, Tanzania.