Fucus tournefortii Lamouroux, 1805: 44–47, pl. XXVI: fig. 1 (syntype localities: Corsica; southern France; Italy).
Zonaria tournefortii (Lamouroux) Montagne, 1846b: 32–33.—Levring, 1938: 19.— Stephenson, 1947: 300.— Day, Millard, & Harrison, 1952: 413.— Isaac, 1953: 66.— Simons, 1964b: 196, 197, fig. 4, pl. 2B.— Simons, 1969: 250, fig. (s.n.).— Simons, 1977: 28, fig. 61.— Seagrief, 1980: 23, fig. on pl. 5.— Bolton & Stegenga, 1987: 170.— Seagrief, 1988: 44, fig. 5:4.— Farrell, Critchley, & Aken, 1993: 150.— Branch et al., 1994: 314.
Taxonomic synonym:
Zonaria flava C. Agardh var. angusta Suhr, 1840: 259 (syntype localities: Algiers, Algeria; Montpellier, France).—Drège, 1843: 157 (without varietal designation), 230 ("v. angul. Suhr'').
INDIAN OCEAN DISTRIBUTION: South Africa.
Note: Zonaria flava var. angusta is placed in the synonymy of Z. tournefortii in consideration of the facts that Z. flava has been merged with Z. tournefortii (by C. Agardh, 1820a: 130) and that Suhr's variety has not been recognized by subsequent workers. Regardless of the disposition of Suhr's type, Drège's material from Natal is referable to Z. tournefortii according to Papenfuss (notes, 12.viii.1964), who examined an authentic specimen at Hamburg (HBG).It may be mentioned that Zonaria flava C. Agardh (1817: XX; 1820a: 130) is usually treated as a combination of Fucus flavus Clemente y Rubio (1807: 310). The intended basionym, however, is a misapplication of F. flavus Linnaeus fil. (1782: 452), which applies to a species of uncertain identity but probably a sponge or a bryozoan. Zonaria flava is thus treated as the name of a new species validated by reference to Clemente's description. C. Agardh (1822 [1822–1823]: 384) made his intention clear by discussing Fucus flavus Linnaeus fil. as a species inquirenda in connection with Rhodomela.
It may also be mentioned that the binomial Zonaria tournefortii was used in passing by C. Agardh (1817: XXXIX), but it is invalid in that publication because the species was not accepted (that is, not listed on p. XX).