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Cryothecomonas aestivalis Drebes et al., 1996. Colourless flagellates, in the free, motile stage, oblong to oval, 9-12 microns long and 4-5 microns wide, two apically inserted flagella, anteriorly directed flagellum 15 microns long, posteriorly directed flagellum up to 25 microns Feeds on the marine planktonic diatom Guinardia delicatula. Flagellate penetrates the diatom frustule. Trophonts gradually phagocytize the host cytoplasm by means of a pseudopodium, which emerges posteriorly through a gap in the theca. Theca delicate, consisting of two layers, occasionally lacking. Trophonts and division stages with shortened, in part basally thickened flagella. Mature trophonts give rise to 8-32 new flagellates (swarmers). Defecation before the last division.
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Chlorarachnion (clore-a-rack-knee-on) reptans, an unusual autotrophic amoeboid organism. The plastids were obtained by endosymbiosis from an alga, and a residual algal nucleus, referred to as a nucleomorph, provides genetic information for plastid activity. Cells often form extensive arrays with interconnected pseudopodia. The plastids are emphasised in this image. Differential interference microscopy.
data on this strain.
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Melgar de Tera, Castille and Leon, Spain
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San Martn de Castaeda, Castilla y Len, Espaa
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Canencia, Madrid, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Lumbreras, La Rioja, Spain
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S Pedro, Galicia, Spain
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Galende, Castile and Len, Spain
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Rhogostoma (row-gaw-stow-ma) is a rarely reported amoeba with a flexible surrounding test and with a small opening through which pseudopodia can emerge. Two cells with common cytoplasm, showing the thin nature of the pseudopodia. Phase contrast.
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Small gliding flagellate with one long trailing flagellum and one short one. Phase contrast microscopy.
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Lotharella (loath-are-ell-a), amoeboid cells with plastids. Differential interference microscopy. Leptosiropsis (leapt-owe-sire-op-sis) torulosa, green alga with organic wall that is produced in layers. Phase contrast microscopy.
data on this strain.
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Cercomonas, gliding flagellate, with very flexible body, one flagellum projecting anteriorly and moving with a stiff beat, the other flagellum trailing behind. Phase contrast.
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Galende, Castille and Leon, Spain
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Franceses, Canary Islands, Spain
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Galende, Castile and Len, Spain
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Puras de Villafranca, Castille and Leon, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Rhogostoma (row-gaw-stow-ma) is a rarely reported amoeba with a flexible surrounding test and with a small opening through which pseudopodia can emerge. The opening is at the bottom of the cell and looks as if it has two lips. Folds in the test are evident. Phase contrast.
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Kiitoksia kaloista Tong et al., 1997. Small spherical gliding cells with a near spherical body measuring 2- 4 microns in diameter. Two flagella insert about a third of the way up the cell and are directed backwards during gliding. One flagellum is about twice the cell length. The other is about half the cell length or shorter. The short flagellum is difficult to see using light microscopy and could possibly be overlooked. Gliding is smooth, with the cell and long flagellum applied to the substratum. Cells sometimes waggle slightly from side to side.
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Cercomonas, a common type of gliding flagellate, the body is almost amoeboid, one flagellum extends anteriorly and beats stiffly, the other trails behind the cell while it is moving. Although common, these organisms are very hard to identify. From a freshwater pond near Boise, Idaho. Brightfield.
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Ribadelago, Castille and Leon, Spain