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Colony, shown as if attached to the air-water interface. Long brown stalks support small balls of colorless cells.
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Portrait of the colonial chrysophyte, Anthophysa vegetans (Müller, 1773) Stein, 1878. Collected from an ephemeral freshwater puddle on the lawn of a public park near Boise, Idaho.September 2006. DIC.
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Portrait of the colonial chrysophyte, Anthophysa vegetans (Müller, 1773) Stein, 1878. Collected from an ephemeral freshwater puddle on the lawn of a public park near Boise, Idaho.September 2006. DIC.
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Portrait of the colonial chrysophyte, Anthophysa vegetans (Müller, 1773) Stein, 1878. Collected from an ephemeral freshwater puddle on the lawn of a public park near Boise, Idaho.September 2006. DIC.
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Cyclonexis (sigh-clo-neck-sis) a colonial chrysophyte (stramenochrome), cells are grouped together to form arcs or hoops. Each cell with yellow/brown chloroplasts, and one long and one short flagellum. Phase contrast.
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Ochromonas (och-row-moan-ass) (tentative identification) iconic chrysophyte alga, with two emergent flagella, one long drawing water towards the cell or dragging the cell forward into the water, and with a short flagellum Plastid with chlorophylls a and c giving a browny green colour, eye-spot located at front margin of plastid. Phase contrast.
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ATCC culture 30004. Freshwater.
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ATCC culture 30004.
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Spumella (spew-mell-a), a heterotrophic stramenopile also referred to as Monas. With one long flagellum and one short flagellum which flops over the body. The long flagellum has hairs (not visible with the light microscope), but the presence of which causes fluid to be drawn towards the cell. The current carries particles of food which can be ingested after they make contact with the surface of the cell. Phase contrast.
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Spumella (spew-mell-a) (Monas) (moan-ass) the archetypical colourless chrysophyte (stramenopile), almost certainly secondarily without plastid. With typical long and short flagellum, posterior inclusion is leucosin storage granule. This rounded form is common in stressed cells. Phase contrast.
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Spumella (spew-mell-a) (Monas) (moan-ass) the archetypical colourless chrysophyte (stramenopile), almost certainly secondarily without plastid. With typical long and short flagellum, posterior inclusion is leucosin storage granule. This is a very typical shape for small chrysophytes. Phase contrast.
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Spumella (spume-ell-a) (=Monas) a colourless chrysophyte cell, with two flagella, only one of which is visible here. The flagellum beats with an undulating beat, and water is drawn towards the top of the cell. These organisms usually consume suspended bacteria. 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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Spumella (spew-mell-a) (Monas) (moan-ass)
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Spumella, a colorless chrysophyte flagellate. Cells are solitary and may be free-swimming or attached to subratum by drawn out posterior as seen here. The cell body is pyriform and truncate anteriorly with two unequal length flagella (the longer with tripartite hairs visible only by electron-microscopy, the short one smooth). Cells are phagotrophic. One or more contractile vacuoles. From temporary rainwater pool in grass field near Boise, Idaho. Phase contrast.
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The cell on the left is very distressed, but is included to show the distinctive long and short flagella of the true chrysophytes. Phase contrast micrograph.
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Spumella (Monas) uniguttata Skuja, 1939. Cells 7-12 microns long and 4.5-6 microns wide, metabolic, variable in shape. Cells obovate to oval, anteriorly oblique-truncated and posteriorly rounded, or round to cylindrical in a amoeboid form. Longer flagellum about 2-3 times cell length and short flagellum 1/2-1/3 times cell length. Cytoplasm hyaline. Contractile vacuole in the anterior part and nucleus in the centre.
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Chrysopyxis stenostoma, a solitary chrysophyte, epiphytic on filamentous algae, that occupies a clear vase-like lorica. The lorica may acquire a brownish color from iron and manganese salts with age. The Chrysopyxis attaches to filamentous algae by means of two fine basal projections of the lorica, which form a ring around the algal filament (seen well in this image). The cell is spherical with a single, distally branching rhizopodium that protrudes through an aperture in the lorica. Fine granules pass from the cell body to the branches of the rhizopodium. There are one or two gold-brown chloroplasts. There is no stigma. Division occurs within the lorica with one cell remaining and the other escaping as a flagellated swarmer that goes on to form its own lorica. From organically enriched standing freshwater near Boise, Idaho. Differential interference contrast.
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Lagynion (lag-in-ee-on) scherffelii is an atypical chrysophyte alga, living within a lorica with a small tube from which fine pseudopodia emerge. With golden plastids. Phase contrast microscopy.
data on this strain.
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Lagynion (lag-in-ee-on) scherffelii is an atypical chrysophyte alga, living within a lorica with a small tube from which fine pseudopodia emerge. With golden plastids. Differential interference microscopy.
data on this strain.
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Mallomonas (ma-la-moan-ass) is a synurophyte alga, traditionally regarded as a chrysophyte or related to the chrysophytes, but distinguished by the presence of extracellular siliceous scales. This genus has large chlorophyll a and c containing plastids, an apical flagellum, and a coating of slipper shaped scales each of which has a long projecting spine. Differential interference contrast.
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Mallomonas (ma-la-moan-ass) is a synurophyte alga, traditionally regarded as a chrysophyte or related to the chrysophytes, but distinguished by the presence of extracellular siliceous scales. This genus has large chlorophyll a and c containing plastids, an apical flagellum, and a coating of slipper shaped scales each of which has a long projecting spine. This image is a detail of the empty periplast (coating of scales and spines) and showing the two kinds of scales which make up the periplast. Differential interference contrast.
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Mallomonas (ma-la-moan-ass) is a synurophyte alga, traditionally regarded as a chrysophyte or related to the chrysophytes, but distinguished by the presence of extracellular siliceous scales. This genus has large chlorophyll a and c containing plastids, an apical flagellum, and a coating of slipper shaped scales each of which has a long projecting spine. Differential interference contrast.