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Detail of test of Arcella gibbosa (Penard,1890) demonstrating multiple small pores. From freshwater pond near Boise, Idaho. Brightfield. Oblique illumination.
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Lateral view of Arcella gibbosa (Penard,1890). This species is distinguished by a brown domed test with multiple concave facets on the aboral surface. The aperture is recessed in a conical depression. From a freshwater pond near Boise, Idaho. Phase contrast
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Aboral view of Arcella gibbosa. This species is distinguished by a brown domed test with multiple concave facets on the aboral surface. The aperture is recessed in a conical depression. From a freshwater pond near Boise, Idaho. Phase contrast
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Lateral view of the testate amoeba, Arcella gibbosa (Penard,1890) in late division. The parent cell is visible through a small rupture in its test.The daughter cell is to the viewers right. Division begins by protrusion of a cytoplasmic bud through the pseudostome of the parent cell accompanied by nuclear mitosis. Preformed thecagenous granules formed in the Golgi apparatus are extruded to the surface of this bud and then assemble to form a layer of keratin-like protein. After molding of the test cytokinesis occurs and the daughter cell occupies the new test. The test of the daughter cell is colorless and transparent but will become dark brown and translucent as it is colored by mineral salts. This species is distinguished by a brown domed test with multiple concave facets on the aboral surface. The aperture is recessed in a conical depression. From a freshwater pond near Boise, Idaho. Phase contrast.
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Large species of Arcella with high dome and an internal collar. Surface has typical honeycomb pattern, often with dented surface, and gets darker with age.
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This testate amoeba constructs a proteinaceous shell with numerous tiny alveoli reinforcing the test. The picture shows the test from dorsal and ventral. On the ventral side the aperture, two contractile vacoules and one nucleus with centric nucleolus is visible. Arcellae have two nuclei. Multi layer image using 25 DIC frames with manual stacking technique using Corel Photopaint. The scale bar indicates 25 µm. Collected from bottom sediments of a rain storage reservoir in Kiel (Schleswig-Holstein, Germany). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Multi layer image using 35 frames generating depth of focus, stacked manualle using Corel Photopaint. Scale bar indicates 25 µm. Sample from a pond on the island of Hiddensee (Baltic Sea, Germany). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.
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Scale bar indicates 25 µm. Sample from the pond Hegne Moor situated in the vicinity of Lake Constance. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.Image under Creative Commons License V 3.0 (CC BY-NC-SA).
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Canencia, Madrid, Spain
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Covaleda, Castille and Leon, Spain
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Sobrado, Galicia, Spain
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Canencia, Madrid, Spain
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El Rasillo, La Rioja, Spain
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Longitude (deg): -2.1. Latitude (deg): 54.0. Longitude (deg/min): 2° 10' W. Latitude (deg/min): 54° 10' N. Vice county name: Mid-west Yorks. Vice county no.: 64. Country: England. Identified by: Malcolm Storey. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 180.
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Longitude (deg): -2.1. Latitude (deg): 54.0. Longitude (deg/min): 2° 10' W. Latitude (deg/min): 54° 10' N. Vice county name: Mid-west Yorks. Vice county no.: 64. Country: England. Identified by: Malcolm Storey. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 180.
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Longitude (deg): -2.1. Latitude (deg): 54.0. Longitude (deg/min): 2° 10' W. Latitude (deg/min): 54° 10' N. Vice county name: Mid-west Yorks. Vice county no.: 64. Country: England. Identified by: Malcolm Storey. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 180.
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Longitude (deg): -2.1. Latitude (deg): 54.0. Longitude (deg/min): 2° 10' W. Latitude (deg/min): 54° 10' N. Vice county name: Mid-west Yorks. Vice county no.: 64. Country: England. Identified by: Malcolm Storey. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 180.
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Longitude (deg): -2.1. Latitude (deg): 54.0. Longitude (deg/min): 2° 10' W. Latitude (deg/min): 54° 10' N. Vice county name: Mid-west Yorks. Vice county no.: 64. Country: England. Identified by: Malcolm Storey. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 180.
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Longitude (deg): -2.1. Latitude (deg): 54.0. Longitude (deg/min): 2° 10' W. Latitude (deg/min): 54° 10' N. Vice county name: Mid-west Yorks. Vice county no.: 64. Country: England. Identified by: Malcolm Storey. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 180.
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Longitude (deg): -2.1. Latitude (deg): 54.0. Longitude (deg/min): 2° 10' W. Latitude (deg/min): 54° 10' N. Vice county name: Mid-west Yorks. Vice county no.: 64. Country: England. Identified by: Malcolm Storey. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 180.
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Longitude (deg): -2.1. Latitude (deg): 54.0. Longitude (deg/min): 2° 10' W. Latitude (deg/min): 54° 10' N. Vice county name: Mid-west Yorks. Vice county no.: 64. Country: England. Identified by: Malcolm Storey. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 180.