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Chlamydaster, centrohelid heliozoon in which the cell body is surrounded by a layer of mucus. Pseudopodia with internal microtubular supports and with prominent extrusomes (kinetocysts). Not common.
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Lumbreras, La Rioja, Spain
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Pavlova (pav-low-va) small atypical haptophyte (prymnesiophyte, pavlovophyte) alga, two plastids, two smooth flagella. Differential interference microscopy.
data on this strain.
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Portrait of the heterophrid centroheliozoan, Chlamydaster sterni (Rainer, 1968). The external surface of the cell is coated by a thick homogeneous coat of mucous without siliceous elements. Bacteria and debris sometimes adhere to the mucous coat. The axopodia protrude through the mucous. The axopodia bear extrusomes (not seen here). There is a single contractile vacuole. The other species in this genus, C. laciniatus (Penard, 1904) is distinguished by its fimbriated mucous coat. C. sterni is planktonic in both freshwater and marine habitats. Collected from a commercial saltwater aquarium in Boise, Idaho November 2004. Phase contrast.
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Lumbreras, La Rioja, Spain
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Pavlova (pav-low-va) small atypical haptophyte (prymnesiophyte, pavlovophyte) alga, two plastids, two smooth flagella. Differential interference microscopy.
data on this strain.
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Portrait of the heterophrid centroheliozoan, Chlamydaster sterni (Rainer, 1968). The external surface of the cell is coated by a thick homogeneous coat of mucous without siliceous elements. Bacteria and debris can be seen here adhering to the mucous coat. The axopodia protrude through the mucous. Extrusomes appear here as small beads along some of the axopodia. The contractile vacuole is seen at 9 oâclock. Several large cytoplasmic food vacuoles are visible and a small particle of food at 2 oâclock is about to be ingested. The other species in this genus, C. laciniatus (Penard, 1904) is distinguished by its fimbriated mucous coat. C. sterni is planktonic in both freshwater and marine habitats. Collected from a commercial saltwater aquarium in Boise, Idaho. DIC.
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Vilobi Del Penedes, Catalonia, Spain
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This image was made from samples taken during a scientific cruise in the Pacific. Water was filtered to concentrate the organisms that were present, then dried onto a thin sheet of plastic and then shadowed with a fine layer of metal to provide contrast. The preparation was then observed with an electron-microscope. This technique has been used to document the diversity of marine microbes, especially, protists in the oceans.
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Heterophrys (het-err-off-riss) is a centrohelid heliozoon - the most speciose group of heliozoa. The heliozoa do not form a natural (monophyletic and holophyletic) group of protists, but a type of organization that have been arrived at from a number of different evolutionary lineages. Heterophrys is apparently naked, careful scrutiny usually reveals delicate radiating (organic) spicules. the arms terminate on a non-nuclear organizing centre (the dark dot in this cell). Heliozoa are predators, motile prey is captured after swimming into the arms. This cell seems to have been eating algae. Differential interference contrast.
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Lumbreras, La Rioja, Spain
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This image was made from samples taken during a scientific cruise in the Pacific. Water was filtered to concentrate the organisms that were present, then dried onto a thin sheet of plastic and then shadowed with a fine layer of metal to provide contrast. The preparation was then observed with an electron-microscope. This technique has been used to document the diversity of marine microbes, especially, protists in the oceans.
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Heterophrys (het-err-off-riss) is a centrohelid heliozoon - the most speciose group of heliozoa. The heliozoa do not form a natural (monophyletic and holophyletic) group of protists, but a type of organization that have been arrived at from a number of different evolutionary lineages. Heterophrys is apparently naked, careful scrutiny usually reveals delicate radiating (organic) spicules. the arms terminate on a non-nuclear organizing centre (the dark dot in this cell. Heliozoa are predators, motile prey is captured after swimming into the arms. This cell seems to have been eating algae. Phase contrast.
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This image was made from samples taken during a scientific cruise in the Pacific. Water was filtered to concentrate the organisms that were present, then dried onto a thin sheet of plastic and then shadowed with a fine layer of metal to provide contrast. The preparation was then observed with an electron-microscope. This technique has been used to document the diversity of marine microbes, especially, protists in the oceans.
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Heterophrys (het-err-off-riss) is a centrohelid heliozoon - the most speciose group of heliozoa. Heterophrys is apparently naked, careful scrutiny usually reveals delicate radiating (organic) spicules. the arms terminate on a non-nuclear organizing centre (the dark dot in this cell. Heliozoa are predators, motile prey is captured after swimming into the arms - as can be seen here. Phase contrast.
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This image was made from samples taken during a scientific cruise in the Pacific. Water was filtered to concentrate the organisms that were present, then dried onto a thin sheet of plastic and then shadowed with a fine layer of metal to provide contrast. The preparation was then observed with an electron-microscope. This technique has been used to document the diversity of marine microbes, especially, protists in the oceans.
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Heterophrys (het-err-off-riss) is a centrohelid heliozoon, distinguished by having radially arrayed organic spicules arising from the surface of the cell. The longer rays with granules are the arms - pseudopodial extensions supported by microtubules. The arms are used to capture food. Phase contrast. Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.
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This image was made from samples taken during a scientific cruise in the Pacific. Water was filtered to concentrate the organisms that were present, then dried onto a thin sheet of plastic and then shadowed with a fine layer of metal to provide contrast. The preparation was then observed with an electron-microscope. This technique has been used to document the diversity of marine microbes, especially, protists in the oceans.
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Chrysochromulina (cry-so-crumb-you-line-a) a single-celled haptophyte, with two similar flagella, a short haptonema lying between the flagella, and golden plastids. This may be C. herdlensis. Differential interference microscopy.
data on this strain.
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Portrait of heterophrys, a small heliozoon coated in very thin organic spines. This thin axopodia contain prominent spherical extrusomes are fully extended in this image. Axopodia contract when the organism is disturbed, bunching extrusomes at the cell surface as seen in the other image. Usually described as a marine genus, these individuals were collected from an organically enriched standing freshwater pond near Boise, Idaho. Phase contrast
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Chrysochromulina (cry-so-crumb-you-line-a) a single-celled haptophyte, with two similar flagella, a short haptonema lying between the flagella, and two golden plastids. This may be C. herdlensis. Differential interference microscopy.
data on this strain.
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Portrait of Heterophrys, a centroheliozo0n with fine radial organic spicules passing through a mucus coat. Axopodia bearing extrusomes are seen in this image. Some species contain endosymbiotic algae. From freshwater pond near Boise, Idaho. Phase contrast.
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This image was made from samples taken during a scientific cruise in the Pacific. Water was filtered to concentrate the organisms that were present, then dried onto a thin sheet of plastic and then shadowed with a fine layer of metal to provide contrast. The preparation was then observed with an electron-microscope. This technique has been used to document the diversity of marine microbes, especially, protists in the oceans.