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Trepomonas (tree-poe-moan-ass) agilis Dujardin, 1841. Cell is ovoid, but S-shaped in cross section and is about 11 microns long. Two nuclei are located anteriorly. Two groups of flagella are inserted laterally at the end of each groove: two long flagella and six short flagella. The length of the long flagella was not measured, but the short falgella are less than half the cell length and lie in the grooves. The cell moves by swimming. Contractile vacuoles are seen. Rarely observed.
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Trepomonas (tree-poe-moan-ass) agilis Dujardin, 1841. Cells are 8-12microns long, S-shaped in cross-section, ovoid, egg-shaped or elongate. Two opposed grooves run spirally, along the posterior two thirds to three quarters of the cell. Four flagella insert at the head of each groove. Of these, one flagellum, the same length as the cell or slightly shorter, is directed laterally. The other flagella are less than half the length of the cell, are directed posteriorly and lie within the groove. Two elongate nuclei are located anteriorly. The cytoplasm has a granular appearance, and exhibits cyclosis. Food vacuoles and empty vacuoles are scattered within the cell. Cells rotate smoothly as they swim.
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Trepomonas agilis (Dujardin, 1841). Cell is ovoid, but S-shaped in cross section. Two nuclei are located anteriorly. Two groups of flagella are inserted laterally at the end of each groove: two long flagella and six short flagella. The short falgella are less than half the cell length and lie in the grooves (seen best here to viewer's left). Contractile vacuoles are seen.Collected from putifying sample from a freshwater pond near Boise, Idaho.DIC.
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Trepomonas agilis Dujardin, 1841. Cell is ovoid, but S-shaped in cross section. Two nuclei are located anteriorly (densley stained here). Two groups of flagella are inserted laterally at the end of each groove: two long flagella and six short flagella (seen here).Stained by the silver carbonate technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991). Collected from a putrifying sample from a freshwater pond near Boise, Idaho.Brightfield.
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Diplomonad flagellate with a bilaterally compressed cell (5-30 µm) with two anterior nuclei, two lateral locomotory flagella, and two sets of three recurrent flagella situated in two posterior grooves. The anterior part of the cell is occupied by two crescent-shaped nuclei which abut on top. The two set of flagella are inserted on each side of the cell body near the equator at the base of each nucleus. The posterior half of the cell is grooved by two depressions or pockets each containing three recurrent flagella. The grooves are the site of ingestion of food, usually bacteria. One contractile vacuole forms in the middle part and discharges at the posterior end. Free-living in freshwater microaerophilic habitats.Image showing two lateral locomotory flagella (haematoxylin staining).
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Diplomonad flagellate with a bilaterally compressed cell (5-30 µm) with two anterior nuclei, two lateral locomotory flagella, and two sets of three recurrent flagella situated in two posterior grooves. The anterior part of the cell is occupied by two crescent-shaped nuclei which abut on top. The two set of flagella are inserted on each side of the cell body near the equator at the base of each nucleus. The posterior half of the cell is grooved by two depressions or pockets each containing three recurrent flagella. The grooves are the site of ingestion of food, usually bacteria. One contractile vacuole forms in the middle part and discharges at the posterior end. Free-living in freshwater microaerophilic habitats. Image showing two two anterior crescent-shaped nuclei (haematoxylin)
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Transmission EM, longitudinal section showing the lateral insertion of the basal bodies/flagella and the two posterior cytostomal dimples.
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Transmission EM, posterior transverse section showing the two opposite cytostomal openings containing three recurrent flagella.
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ATCC culture 50286.
