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Botrydium (bot-rid-ee-um), xanthophyte - a group of walled stramenopiles although unlike most stramenopiles with plastids, the xanthophytes have a much greener colour. Botrydium is usually assigned to the Vaucheriales, which are characterised by being able to adopt a coenocytic (multinucleate) body form. Normally grows on mud. Phase contrast.
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Closeup of Porosira glacialis chain. Note that the delicate spines are chitinous. Focus on cell center showing cytoplasmic accumulation around the nucleus. Scale bar indicates 50 µm. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Material from the Netherlands.
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Image shows chloroplasts and nuclei. The image was built up using several photomicrographic frames with manual stacking technique. Scale bar indicates 50 µm. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Valves are rectangular in girdle view and elliptical in valve view. Each cell has four ribbon like and folded chloroplasts, two along each side of the girdle.
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Lilleør, Samsø, Danmark
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Lillebælt ved Nørreskoven på Als. Danmark
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Fornæs, Djursland, Danmark
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Lendrup S Løgstør, Jylland, Danmark
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Fornæs
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Sardinia
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Limfjorden Ertebølle
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Kirkedals bæk ved Hobro, Danmark
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Terpsinoe americana by Josef PantocsekBeiträge zur Kenntnis der Fossilen Bacillarien Ungarns / nach dem ungarischen Manuscripte von Josef Pantocsek (1840-1916)Berlin :W. Junk,1903-1905.Band I. Plate VI
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Fucus a maree basse, pres Angoulins.
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Pheophyceees (Algues brunes) Laminariees, Laminaria saccharina (Lamour).
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Rosenvingea orientalis.
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Large Nereocystis plant collected near Low Cape, Kodiak Island. Note holdfast on ground at extreme right
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[Renfrewia] : Longitudinal section of stipe.
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Spatoglossum schraederi.
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Pheophycees (Algues brunes) Fucacees, Bifurcaria tuberculata (L.) Decn. et Thur..
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Poole, England, United Kingdom
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epiphytic on Cystoseira osmundacea
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Kimmeridge, England, United Kingdom