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Leptomyxa (lep-toe-mix-a) is an amoeba which can be quite large. Typically with an extended body form with thick strands of cytoplasm forming a network. Individual pseudopodia tend to be fine and tapering. Typically with multiple nuclei. From soils. Phase contrast.
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Leptomyxa (lep-toe-mix-a) is an amoeba which can be quite large. Typically with an extended body form with thick strands of cytoplasm forming a network. Individual pseudopodia tend to be fine and tapering. This image is of a cyst. From soils. Differential interference contrast
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Paraquadrula irregularis test. This amoeba is a member of the Arcellinida. The test is round when viewed en-face (the view in these images) and ovoid in the lateral view. The test is composed of secreted rectangular calcite plates cemented into slightly irregular rows. The pseudostome is a broad oval shape (located towards the bottom in in these images). Although the test plates are similar in appearance to those of Quadrulella the plates are siliceous in the latter and the test of Quadrulella is pyriform with a distinct neck. Feeds on algae. From freshwater pond near Boise, Idaho. Oblique illumination.
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Paraquadrula irregularis - a member of the Arcellinida. The test is round when viewed en-face (the view in these images) and ovoid in the lateral view. The test is composed of secreted rectangular calcite plates cemented into slightly irregular rows. The pseudostome is a broad oval shape (located atowards the bottom in in these images). Although the test plates are similar in appearance to those of Quadrulella the plates are siliceous in the latter and the test of Quadrulella is pyriform with a distinct neck. Feeds on algae. From freshwater pond near Boise, Idaho. Phase contrast.
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Portrait of Netzelia tuberculata (Wallich,1864) test. The test or shell is composed of quartz particles arranged in small knob-like aggregates on its surface. The approximately circular shell aperture has a narrow collar of quartz particles. Pseudopodia (not seen in this image) are lobose. Collected from freshwater irrigation canal near Boise, Idaho in November 2003. Brightfield illumination.
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This species has been moved from genus Difflugia to Netzelia (family Lesqueruesiidae). Most of the agglutinated particles are silicious idiosoms, all xenosomes are covered with silica.This multi layer image was built up using 4 brightfield frames with a manual stacking technique using Corel Photopaint. The specimen was gathered in a tiny freshwater pond at the island of Hiddensee (Baltic Sea, Germany) which shows a fascinating biodiversity of naked and testate amoebae. Images were taken using Zeiss Standard with Olympus C7070 CCD camera.
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This species has been moved from genus Difflugia to Netzelia (family Lesqueruesiidae). Most of the agglutinated particles are silicious idiosoms, all xenosomes are covered with silica. This multi layer image of Netzelia tuberculata was built up using 12 brightfield frames with a manual stacking technique using Corel Photopaint. The scale bar indicates 50 µm. The specimen was gathered in a tiny freshwater pond at the island of Hiddensee (Baltic Sea, Germany) which shows a fascinating biodiversity of naked and testate amoebae. Images were taken using Zeiss Standard with Olympus C7070 CCD camera.
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This species has been moved from genus Difflugia to Netzelia (family Lesqueruesiidae). Most of the agglutinated particles are silicious idiosoms, all xenosomes are covered with silica. The texture of the test and the outline of the pseudostome collar of Netzelia tuberculata are (according to R. Meisterfeld) very variable. This multi layer image was built up using 17 brightfield frames with a manual stacking technique using Corel Photopaint. The specimen was gathered in a tiny freshwater pond at the island of Hiddensee (Baltic Sea, Germany) which shows a fascinating biodiversity of naked and testate amoebae. Images were taken using Zeiss Standard with Olympus C7070 CCD camera.
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Apertural view on Netzelia tuberculata depicting the pseudostome collar, pseudopods and defecation vacuole. This multi layer image was built up using 42 frames with a manual stacking technique using Corel Photopaint. The specimen was gathered in a tiny freshwater pond at the island of Hiddensee (Baltic Sea, Germany) which shows a fascinating biodiversity of naked and testate amoebae. Images were taken using Zeiss Standard with Olympus C7070 CCD camera.
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SEM of Netzelia tuberculata test. Courtesy of Lab Dr. Karl-Heinz Schaeffner, Solingen, Germany. Sample from a freshwater pond on the island of Hiddensee (Baltic Sea, Germany).
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