Description
in Lobban , 1995 Solid gelatinous colonies with cells located around the periphery ; colonies macroscopic , appearing pale yellow in color ; zoospores formed by 2 successive divisions of vegetative cells; zoospores pyriform or ovoid with one to several chloroplasts and laterally inserted flagella ; longer flagellum directed anteriorly , shorter flagellum directed posteriorly; eyespots absent; asexual reproduction by colony fragmentation and zoospore formation ; sexual reproduction unknown ; marine , monospecific genus. See Lobban et al. , 1995. Colony fragile , cylindrical in shape, 30-50 mm long and approximate ly 5 mm wide; cells spherical , 8-14 11m in diameter; cells covered with a thin cell wall ; numerous muciferous bodies located near the periphery of the cells ; 4 to 8 parietal chloroplasts , elliptical to saucer-shaped; chloroplasts with 1 or 2 projecting pyrenoids; zoospores 4-5 11m long , 2-3 11m wide , with a single posterior chloroplast; anterior flagellum 9-13 ~Lm long , posterior flagellum 5-6 11m long . a ro ck, extend ed by water current. Scale=1 0 mm. b. zoospore. Sca le=5 ~m . d c a b typical filament. b. lower magnification showing branching of filament. c. Enlarged cells showing ch loroplast structure. d. Zoospore. Scale bars=50 ~m (a) , 200 1-1m (b) , and 10 ~-tm (c , d). (From Taylor, 1 951)
Type species
Chrysocystis tragilis Lobban , Honda & Chihara in Lobban et al., 1995 (Fig . 4) .
Figures
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Raw text
in Lobban , 1995 Solid gelatinous colonies with cells located around the periphery ; colonies macroscopic , appearing pale yellow in color ; zoospores formed by 2 successive divisions of vegetative cells; zoospores pyriform or ovoid with one to several chloroplasts and laterally inserted flagella ; longer flagellum directed anteriorly , shorter flagellum directed posteriorly; eyespots absent; asexual reproduction by colony fragmentation and zoospore formation ; sexual reproduction unknown ; marine , monospecific genus. See Lobban et al. , 1995. Colony fragile , cylindrical in shape, 30-50 mm long and approximate ly 5 mm wide; cells spherical , 8-14 11m in diameter; cells covered with a thin cell wall ; numerous muciferous bodies located near the periphery of the cells ; 4 to 8 parietal chloroplasts , elliptical to saucer-shaped; chloroplasts with 1 or 2 projecting pyrenoids; zoospores 4-5 11m long , 2-3 11m wide , with a single posterior chloroplast; anterior flagellum 9-13 ~Lm long , posterior flagellum 5-6 11m long . a ro ck, extend ed by water current. Scale=1 0 mm. b. zoospore. Sca le=5 ~m . d c a b typical filament. b. lower magnification showing branching of filament. c. Enlarged cells showing ch loroplast structure. d. Zoospore. Scale bars=50 ~m (a) , 200 1-1m (b) , and 10 ~-tm (c , d). (From Taylor, 1 951)