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Portrait of the colonial chrysophyte, Uroglena volvox (Ehrenberg, 1835). colonies free-swimming, spherical, ellipsoidal or oblong, up to several 100 (rarely >1000)μm in diameter; cells radially arranged in a single layer at the periphery of a gelatinous matrix;the friable colonies are easily disrupted by the pressure of the coverslip. The interior of the matrix is fairly homogeneous or containing a system of fine, radiating and branched stalks to which the cells are attached by their pointed posterior ends; individual cells Ochromonas-like, with 2 flagella of unequal length; chloroplasts 1-2, laminate to discoid, at least in one species containing a pyrenoid; eyespot usally 1 (rarely 2 or lacking); contractile vacuoles 1-3; numerous muciferous bodies located at the cell periphery; nutrition phototrophic and phagotrophic; cell division longitudinal; colony reproduction by constriction into two daughter colonies or by fragmentation; stomatocysts frequently observed, their ornamentation used for species identification; some species of common occurrence in the plankton of lakes and ponds, sometimes bloom-forming, one marine species. Collected from a freshwater dredge pond near Idaho City, Idaho June 2005. Brightfield.
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Portrait of the colonial chrysophyte, Uroglena volvox (Ehrenberg, 1835). colonies free-swimming, spherical, ellipsoidal or oblong, up to several 100 (rarely >1000)μm in diameter; cells radially arranged in a single layer at the periphery of a gelatinous matrix;the friable colonies are easily disrupted by the pressure of the coverslip. The interior of the matrix is fairly homogeneous or containing a system of fine, radiating and branched stalks to which the cells are attached by their pointed posterior ends (visible here); individual cells Ochromonas-like, with 2 flagella of unequal length; chloroplasts 1-2, laminate to discoid, at least in one species containing a pyrenoid; eyespot usally 1 (rarely 2 or lacking); contractile vacuoles 1-3; numerous muciferous bodies located at the cell periphery; nutrition phototrophic and phagotrophic; cell division longitudinal; colony reproduction by constriction into two daughter colonies or by fragmentation; stomatocysts frequently observed, their ornamentation used for species identification; some species of common occurrence in the plankton of lakes and ponds, sometimes bloom-forming, one marine species. Collected from a freshwater dredge pond near Idaho City, Idaho June 2005. Phase contrast.
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Portrait of the colonial chrysophyte, Uroglena volvox (Ehrenberg, 1835). colonies free-swimming, spherical, ellipsoidal or oblong, up to several 100 (rarely >1000)μm in diameter; cells radially arranged in a single layer at the periphery of a gelatinous matrix;the friable colonies are easily disrupted by the pressure of a coverslip. The interior of the matrix is fairly homogeneous or containing a system of fine, radiating and branched stalks to which the cells are attached by their pointed posterior ends (visible here); individual cells Ochromonas-like, with 2 flagella of unequal length; chloroplasts 1-2, laminate to discoid, at least in one species containing a pyrenoid; eyespot usally 1 (rarely 2 or lacking); contractile vacuoles 1-3; numerous muciferous bodies located at the cell periphery; nutrition phototrophic and phagotrophic; cell division longitudinal; colony reproduction by constriction into two daughter colonies or by fragmentation; stomatocysts frequently observed, their ornamentation used for species identification; some species of common occurrence in the plankton of lakes and ponds, sometimes bloom-forming, one marine species. Collected from a freshwater dredge pond near Idaho City, Idaho June 2005.DIC.
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Detail view of cells of the colonial chrysophyte, Uroglena volvox (Ehrenberg, 1835). colonies free-swimming, spherical, ellipsoidal or oblong, up to several 100 (rarely >1000)μm in diameter; cells radially arranged in a single layer at the periphery of a gelatinous matrix;the friable colonies are easily disrupted by the pressure of a coverslip. The interior of the matrix is fairly homogeneous or containing a system of fine, radiating and branched stalks to which the cells are attached by their pointed posterior ends (visible here); individual cells Ochromonas-like, with 2 flagella of unequal length; chloroplasts 1-2, laminate to discoid, at least in one species containing a pyrenoid; eyespot usally 1 as in these cells (rarely 2 or lacking); contractile vacuoles 1-3; numerous muciferous bodies located at the cell periphery;a chrysolaminaran (glucopyranoside storgae polymer) vacuole is visible in the osterior of the cell to the viewer's right; nutrition phototrophic and phagotrophic; cell division longitudinal; colony reproduction by constriction into two daughter colonies or by fragmentation; stomatocysts frequently observed, their ornamentation used for species identification; some species of common occurrence in the plankton of lakes and ponds, sometimes bloom-forming, one marine species. Collected from a freshwater dredge pond near Idaho City, Idaho June 2005.DIC.
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Scale bars indicate 10 µm.Two images.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Protist culture of University Duisburg-Essen (Germany) Latitude: 51.463807 Longitude: 7.005321Microscope Zeiss Axioplan, camera Canon EOS 600D.Sample material courtesy of AG Boenigk, University Duisburg-Essen.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact
postmaster@protisten.de.For further information about the image, please click here:
Link to protisten.de page
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Scale bars indicate 10 µm.Two images.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Protist culture of University Duisburg-Essen (Germany) Latitude: 51.463807 Longitude: 7.005321Microscope Zeiss Axioplan, camera Canon EOS 600D.Sample material courtesy of AG Boenigk, University Duisburg-Essen.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact
postmaster@protisten.de.For further information about the image, please click here:
Link to protisten.de page
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Scale bars indicate 10 µm.Two images.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Protist culture of University Duisburg-Essen (Germany) Latitude: 51.463807 Longitude: 7.005321Microscope Zeiss Axioplan, camera Canon EOS 600D.Sample material courtesy of AG Boenigk, University Duisburg-Essen.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact
postmaster@protisten.de.For further information about the image, please click here:
Link to protisten.de page
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Sampling date 12/2016. Scale bar indicates 25 µm.Place name: Pond in the forest of Altenholz-Stift (Schleswig-Holstein, Germany) Latitude: 54.384913 Longitude: 10.125691Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF image.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact
postmaster@protisten.de.For further information about the image, please click here:
Link to protisten.de page
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Sampling date 02/2015. Four images with different magnifications.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Pond on isle of Nordstrand (Schleswig-Holstein, Germany) Latitude: 54.49594138 Longitude: 8.80856752Microscope Zeiss Universal, camera Canon EOS 70D.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact
postmaster@protisten.de.For further information about the image, please click here:
Link to protisten.de page
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Sampling date 02/2015. Four images with different magnifications.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Pond on isle of Nordstrand (Schleswig-Holstein, Germany) Latitude: 54.49594138 Longitude: 8.80856752Microscope Zeiss Universal, camera Canon EOS 70D.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact
postmaster@protisten.de.For further information about the image, please click here:
Link to protisten.de page
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Sampling date 02/2015. Four images with different magnifications.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Pond on isle of Nordstrand (Schleswig-Holstein, Germany) Latitude: 54.49594138 Longitude: 8.80856752Microscope Zeiss Universal, camera Canon EOS 70D.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact
postmaster@protisten.de.For further information about the image, please click here:
Link to protisten.de page
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Sampling date 02/2015. Four images with different magnifications.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Pond on isle of Nordstrand (Schleswig-Holstein, Germany) Latitude: 54.49594138 Longitude: 8.80856752Microscope Zeiss Universal, camera Canon EOS 70D.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact
postmaster@protisten.de.For further information about the image, please click here:
Link to protisten.de page
