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1985a: 505; Lewis and Norris 1987: 11; Santelices and Abbott 1987: 6; Tsuda 1991: 44; South and Yen 1992: 128. Giffordia breviarticulata (J. Agardh) Doty et Albert (nomen nudum) ex Magruder and Hunt 1979: 45. (Figs 95, 98a-e) Plants yellow-brown, tufted, 20-35 mm high, with irregular primary branching and numerous hooked secondary branchlets which hold the filaments in rope-like spongy strands. Filaments about 25 ym thick, composed of rectangular cells about up to 25 X 50 ym. Secondary hook-like branchlets up to 800 ym long and 25 ym broad, arising at 85-90' to main filaments and spaced at 500-700 ym intervals. Plurilocular sporangia 40-45 ym high, short and pyriform, containing about 8 spores and borne on a stalk cell. Distribution Fiji, Caroline Islands, Micronesia, Hawaii, Nauru, Tahiti, Easter Island, Philippines, Taiwan, Ryukyu Islands, Vietnam, China, Ceylon, Maldives, tropical Americas, Europe. Fijian Record New record for Fiji. Rotuman Distribution Lopta (L191 USP 357, *L26, *L27, *L28/ USP S6: 7). Habitat and Remarks Grows as small tangled tufts on the outer reef crest, often attached to seaward-facing rocks exposed to heavy wave action (e.g. at Lopta). Sphacelariales Sphacelariaceae Sphacelaria Lyngbye 1819 Sphaceluriu rigidulu Kutzing 1843: 292 (type locality: Red Sea); Lewis 1984: 8; Silva et al. 1987: 74; Womersley 1987: 166, figs 51d, 54a-g; Garrigue and Tsuda 1988: 63; Abbott 1989: 226; Tsuda 1991: 46; Millar and Kraft 1994a: 14. Sphacelaria furcigera Kutzing 1855: 27, pl. 90, fig. 11 (Type locality: Karak (Khark) Island, Iran) (vide Prud'homme van Reine 1982: 203, figs 508-554; Silva et al. 1987: 74); Weber-van Bosse 1913a: 135; Borgesen 1914: 40; 1926: 72; 1941: 46, fig. 21; Dawson 1954: 400, fig. 14h; 1956: 44; 1957: 110; Taylor 1960: 210, pl. 29, fig. 5; Durairatnam 1961: 31, pl. 6, figs 4-7; Meiiez 1961: 59, pl. 9, figs 103, 104; pl. 10, figs 105-108; pl. 12, figs 126-127; Chapman 1963: 15, fig. 9; Earle 1969: 144, fig. 31; Trono 1969: 28, pl. 1, fig. 6; Womersley and Bailey 1970: 290; Tsuda 1972: 93,'pl. 1, fig. 4; Dawes 1974: 99; Jaasund 1976: 37, fig. 75; Woelkerling 1976: 110, fig. 113; Tsuda and Wray 1977: 102; Lu and Tseng 1984: 202, pl. 102, fig. 2; Lewis 1985: 8; Payri and Meinesz 1985a: 506; Lewis and Norris 1987: 11 (var. tenuis Yamada). (Fig. 99a, b) Thallus light-brown, 7-10 mm high, epiphytic, forming erect penicillate tuft; basal holdfast discoid. Branching sparse to frequent, at irregular narrow angles. Main axis linear and 2 cells thick, 30-35 ym in diameter with rectangular cells about 15 X 35 ym. Propagula
Benthic Marine Algae of Rotuma Island 399 abundant, with paired slender and slightly tapering arms 100-250 pm long and 15-20 pm broad with an approximate angle of 120" between them, borne on a pedicel 230-260 km long and with a convex lenticular apical cell rising to 7.5-18 pm. Lateral unilocular sporangia subspherical and shortly pedicellate, 37-40 km in diameter. Distribution Tropical Indian and Pacific Oceans. Fijian Records Garbary et al. 1991: 253 (as S. furcigera Kutzing); South and Kasahara 1992: 53 (as S. furcigera Kiitzing). Rotuman Distribution Maka Bay (*MAK11/ USP S6: 5). Habitat and Remarks Epiphytic on the base of Sargassum polycystum, in sheltered back reef locations at Maka Bay. Dictyotales Dictyotaceae Dictyopteris Lamouroux 1809 Dictyopteris repens (Okamura) Bgrgesen 1924: 265, fig. 13; Okamura 1931(1929-1932): 47, pl. 275, figs 17-27; 1931: 103; Yamada and Tanaka 1938: 67; Dawson 1956: 44, fig. 34; 1957: 110, fig. 10; Trono 1969: 31; Womersley and Bailey 1970: 291; Tsuda 1972: 94, pl. 3, fig. 1; Tsuda and Wray 1977: 101; Allender and Kraft 1983: 107, fig. 19A, B; Lu and Tseng 1984: 190, pl. 96, fig. 4; Lewis 1985: 10; Lewis and Norris 1987: 11; Santelices and Abbott 1987: 6; Silva et al. 1987: 75; Abbott 1989: 227; Tsuda 1991: 44; Ohba and Enomoto 1992: 29; Verheij and Prud'homme van Reine 1993: 150, pl. 9, fig. 1; Millar and Kraft 1994a: 16. Haliseris repens Okamura 1916: 8, fig. 3; pl. 1, figs 7-18 (type locality: Truk Island, Caroline Island). Neurocarpus repens Okamura 19 16: 8. (Figs 9 1, 92) Fronds recumbent, up to 3 cm long, branching dichotomous with branches 1-3 mm broad; thallus distromatic, 65 pm thick, with a prominent midrib 4-8-cells thick. Distribution Tropical Pacific and Indian Oceans. Fijian Records Garbary et al. 1991: 253; South and Kasahara 1992: 53. Rotuman Distribution Lopta (*L46/ USP S5: 18); Tua'koi (*TI01 USP S5: 10). Habitat and Remarks Found associated with Dictyota friabilis at base of staghorn coral rubble.
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Benthic Marine Algae of Rotuma Isla
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Benthic Marine Aigae 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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