Fucus pinnatifidus Hudson, 1762: 473 (type locality: Harwich, Essex, England fide Maggs & Hommersand, 1993: 403, footnote).
Laurencia pinnatifida (Hudson) Lamouroux, 1813: 130.—J. Agardh, 1852 [1851–1863]: 764–766.— G. Martens, 1868: 100–101.— P. Anand, 1943b: 33.— Salim, 1965: 193.— Subbaramaiah, 1974: 59.— R. Qasim, 1980: table 1.— R. Qasim, 1981: tables 1, 2.— Akbar, 1982: 5–6.— Barratt et al., 1984: species list.— Usmanghani et al., 1984: 76.— R. Qasim & Barkati, 1985: table 2.— R. Qasim, 1986: tables 1, 4.— Usmanghani & Shameel, 1986: tables 1, 3.— Bano, Ali, & Ahmad, 1987: 508.— Bano, Ali, & Ahmad, 1988a: 125.— Bano, Ali, & Ahmad, 1988b: 1349.— Ahmad, Ali, & Bano, 1990: 299.— Ahmad & Ali, 1991a: 4172.— Ahmad & Ali, 1991b: 243.— Ahmad, Ali, et al, 1991: 161.— Naqvi et al., 1992: 136.— Shameel & J. Tanaka, 1992: 54.— Ormond & Banaimoon, 1994: 119.
Osmundea pinnatifida (Hudson) Stackhouse, 1809: 79.
INDIAN OCEAN DISTRIBUTION: India, Oman, Pakistan, Yemen.