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Phacus agilis. Cell observed in freshwater habitats in the vicinity of Broome, Western Australia in September 2003. This image was taken using differential interference contrast optics. This work was supported by the Australian Biological Resources Study.
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Mahide, Castille and Leon, Spain
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Ajamil, La Rioja, Spain
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Madrid, Madrid, Spain
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Urbanizacion Los Pinarejos, Madrid, Spain
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Melgar de Tera, Castille and Leon, Spain
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Canada Del Hoyo, Castille la Mancha, Spain
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Trachelomonas (track-ell-owe-moan-ass) is an autotrophic euglenid flagellate. The genus is distinguished from others because the cells live within a loose fitting lorica with a small opening. The lorica of many species is elaborated with spikes or spines. The lorica accumulates metal salts with age, becoming brown and brittle and often obscuring the bright green colour of the chloroplasts within the cell. Red eyespot evident near the anterior of the cell. There is one emergent flagellum which emerges from the opening of the lorica. After division of the daughter cells will emerge from the opening of the lorica. Most freshwater but occasionally found in brackish habitats. Phase contrast.
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Euglena deses is a worm like gliding Euglena which rarely swims (ignore the Tetraselmis to the right) is one of a group of worm-like species, either with very short flagella or no emergent flagellum. They rely on gliding to make their way through the substrate. Very metabolic. E. deses is distinguished by the rather similar E. mutabilis by the large numbers of plastids (individual plastids cannot be seen in this micrograph). The red spot is the stigma or eye-spot, the nucleus is the grey zone in the centre of the cell. Phase contrast.
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Euglena (you-glee-na) is the iconic representative of the euglenids, a group of flagellates common in freshwaters and marine sediments. Some euglenids have bright green chloroplasts, such as this one, and there is also a small red eyespot located close to the anterior (to the right, here) of the cell. This species, probably E. mutabilis, is worm-like, squirms and has no emergent flagella. Differential interference 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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Villar del Pedroso, Extremadura, Spain
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Hoyo de Manzanares, Madrid, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Canada Del Hoyo, Castille la Mancha, Spain
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Caada del Hoyo, Castilla-La Mancha, Espaa
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Euglena deses. Brightfield portrait of slender very plastic elongate species. Anterior end rounded. Posterior end tapers rather bluntly. Short emergent flagellum not seen here. Chloroplasts are relatively large flat and round or polygonal in outline. Prominent eyespot. Found among decaying leaves on bottom of freshwater pond near Boise, Idaho in October 2002.
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Casas de Fadoncino, Castille and Leon, Spain
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Madrid, Madrid, Spain
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Quinones Del Molino, Madrid, Spain
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Cuelgamuros, Comunidad de Madrid, Espaa
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Logrono, La Rioja, Spain
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Trachelomonas (track-ell-owe-moan-ass) is an autotrophic euglenid flagellate. The genus is distinguished from others because the cells live within a loose fitting lorica with a small opening. The lorica of many species is elaborated with spikes or spines. The lorica accumulates metal salts with age, becoming brown and brittle and often obscuring the bright green colour of the chloroplasts within the cell. Red eyespot evident near the anterior of the cell. There is one emergent flagellum which emerges from the opening of the lorica. Most freshwater but occasionally found in brackish habitats. Differential interference contrast.