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Fijian Records Chapman 1971: 167; South and Kasahara 1992: 54. Rotuman Distribution Fapufa (*F2/ USP S5: 5); Hapmafau (*HAP331 USP S5: 3); Lopta (*L23/ USP S5: 4), Tua'koi (TI31 USP 446). Habitat and Remarks Epiphytic on the base of larger algae (e.g. Avrainvillea amadelpha) or attached to rocks and coral rubble in relatively sheltered middle and back reef areas, widely distributed around the island. Padina Adanson 1763 Padina tenuis Bory de Saint-Vincent 1827: 590 (type locality: fle de France, Mauritius); Womersley and Bailey 1970: 292; Tsuda 1972: 98, pl. 5, fig. 4; Tsuda and Wray 1977: 102; Allender and Kraft 1983: 83, figs 5D, E, 6A; Payri and Meinesz 1985: 505; Lewis and Norris 1987: 12; Garrigue and Tsuda 1988: 62; South and Yen 1992: 128; Verheij and Prud'homme van Reine 1993: 157, pl. 10, fig. 8; Millar and Kraft 1994a: 19. Padina commersonii Bory 1827: 144; Weber-van Bosse 1913a: 178, fig. 51; Yamada and Tanaka 1938: 66; Dawson 1954: 401, fig. 17; 1956: 44; 1957: 110; Taylor 1950: 100, pl. 54, fig. 1; Womersley and Bailey 1969: 436. Padina boryana Thivy in Taylor 1966: 355, fig. 2 (type locality: Tonga); Jaasund 1976: 45, fig. 91; 1977: 516; Papenfuss 1977: 276; Silva et al. 1987: 77; Tsuda 1991: 45. (Fig. 108' Fronds lightly calcified, flabellate, 10-25 mm long and 20-30 mm broad, zonate and light-orange to yellowish in colour. Thalli distromatic (sometimes tristromatic at the base), 57-64(75) pm thick. Outer surface cells (18-25) X (21-28) pm, smaller than inner surface cells which measure (18-30) X (50-85) p,m. Sporangia 57-64 p,m in diameter, in non- indusiate sori occuring in concentric rows midway between hair bands on outer surface of frond. Distribution Fiji, Nauru, Solomon Islands, Micronesia, Tonga, French Polynesia, New Caledonia, Ryukyu Islands, Lord Howe Island, Indonesia, Taiwan, Tanzania. Fijian Records Kapraun and Bowden 1978: 200; South and Kasahara 1992: 54. Rotuman Distribution Solnohu, Juju (USP 869); Fapufa (USP 870, S12: 10). Habitat and Remarks Growing in relatively undisturbed shallow locations, attached to coral rubble. Thivy (in Taylor 1966: 353, Papenfuss (1977: 277), and Silva et al. (1987: 78) consider P. tenuis to be a misapplied name, allegedly based on C. Agardh's (1824: 264) Zonaria pavonia var. tenuis (which actually is Lobophora variegata), and redescribed the species as P. boryana based on type material from Tonga. Womersley and Bailey (1970: 292), after examination of the respective type specimens, more convincingly argue that Bory (1827: 590) based his description on his own material from Mauritius, hence validating the name P. tenuis.
Benthic Marine Algae of Rotuma Island Dictyosiphonales Chnoosporaceae Chnoospora J. Agardh 1847 Chnoospora minima (Hering) Papenfuss 1956: 69; Taylor 1960: 263, pl. 36, figs 3, 4; 1966: 357; Womersley and Bailey 1970: 293; Tsuda 1972: 101, pl. 6, fig. 5; Magruder and Hunt 1979: 39; Lu and Tseng 1984: 184, pl. 93, fig 2; Lewis 1985: 8; Lewis and Norris 1987: 13; Silva et al. 1987: 79; Abbott 1989: 227; Littler et al. 1989: 120; Tsuda 1991: 44; Millar and Kraft 1994a: 24. Fucus minimus Hering 1841: 92 (type locality: 'Port Natal' (Durban), South Africa). Chnoospora atlantica J. Agardh 1847; Dickie 1874b. Chnoospora fastigiata J. Agardh 1848: 171; Borgesen 1941: 63. Chnoospora pacifica J. Agardh 1847: 7 (type locality: Pacific Mexico); Dawson 1954: 405, fig. 20c; Payri and Meinesz 1985a: 504. (Figs 96, 107) Plants dull brown in colour, stiff and up to 40 mm tall, with main axis repeatedly and fastigiately dichotomously branched. Branches 0.5-1 mm broad, broadened and flattened at points of division. Cryptoblasts 9 pm broad and up to 53 pm long present on older branches, being a characteristic feature of this genus (Fritsch 1945: 112). Plants attached to the substratum by a small discoidal holdfast. Distribution Fiji, Solomon Islands, Tahiti, Hawaii, Australia, Vietnam, Philippines, China, Taiwan, Ryukyu Islands, tropical Americas, South Africa. Fijian Records New record for Fiji. Rotuman Distribution Lopta (L181 USP 358, "L30, *L31/ USP S5: 6, L381 USP 479, L39/ USP 478). Habitat and Remarks Found on the reef crest, in exposed locations; typically occurring as clumps on the wave- washed rocks or hidden within Gelidiella acerosa and Chondria mats. Fucaies Sargassaceae Sargassum C. Agardh 1820 Key to the Rotuman Species of Sargassum 1. Main axis with Y-shaped proliferations ..................................... .S. polycystullz 1: Main axis without proliferations ................................................. .S. sp. Sargassum polycystum C. Agardh 1824: 304 (type locality: Sunda Strait, Indonesia); Dickie 1874a: 190; J. Agardh 1889: 119; Howe 1932: 170; Dawson 1954: 406, fig. 22t, u; Durairatnam 1961: 46, pl. 10, figs 14-18; Taylor 1966; Womersley and Bailey 1970: 300; Tsuda 1972: 103, pl. 7, fig. 3; Jaasund 1976: 57, fig. 115; Chapman 1977: 162; Tsuda and Wray 1977: 102; Trono and Ganzon-Fortes 1980: 49; Chou and Chiang 1981: 134, pl. 2, figs 1, 2; Lu and Tseng 1984: 236, pl. 119, fig. 1; Lewis 1985: 24; Trono 1986: 258, fig. 67;
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Benthic Marine Algae of Rotuma Isla
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Fig. 122. Peyssonnelia sp. Cross-se
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A. D. R. N'Yeurt Fig. 136. Hypnea n
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A. D. R. N'Yeurt Fig. 148. Centroce
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A. D. R. N'Yeurt Fig. 156. Ceramium
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A. D. R. N'Yeurt Fig. 168. Grzffith
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Fig. 181. Heterosiphonia crispella
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Fig. 188. (a, b) Chorzdria dasyphyl
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Fig. 200. Herposiphonia secunda f.
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Rotuman Algal Flora Composition At
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CENTRAL AND SOUTHWESTERN PACIFIC RE
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