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In vivo portrait of the volvocid flagellate, Volvulina steinii Playfair,1915. Collected from a temporary rainwater puddle on a grass lawn in Boise, Idaho 43°36'49.03" N 116° 13' 23.77" W elev. 2674 ft.March 2006.Brightfield.
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Gonium pectorale, a common colonial volvocid flagellate. Colonies usually consist of 16 cells (twelve peripheral and four central) in a plate-like arrangement of one layer. An extracellular matrix that is not easily seen connects cells. Cells have a cup-shaped chloroplast with a small anterior stigma. Lateral view of colony. From freshwater pond near Boise, Idaho. Phase contrast.
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Portartit of the volvocid flagellate, Volvulina steinii Playfair,1915. The cells are hemispherical with the flattened face of each toward the exterior in contact with the thin investing gelatinous envelope.The inner limit of the envelope is visible here. the thickness of the investing layer of the gelatinous envelope is indicated here by debris adhering to its exterior surface.Each of the 16 cells in the colony bears two equal-length flagella (seen here in the cell at 12 o'clock). Only cells at the "anterior" end of the colony have eyespots. each cell has two contractile vacuoles (seen here in the cell at 12 o'clock.Collected from a temporary rainwater puddle on a grass lawn in Boise, Idaho In vivo portrait of the volvocid flagellate, 43°36'49.03" N 116° 13' 23.77" W elev. 2674 ft. elev. 2674 ft. March 2006. DIC.
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Gonium pectorale, a common colonial volvocid flagellate. Colonies usually consist of 16 cells (twelve peripheral and four central) in a plate-like arrangement of one layer. An extracellular matrix that is not easily seen connects cells. Cells have a cup-shaped chloroplast with a small anterior stigma. Anteroposterior view of colony. From freshwater pond near Boise, Idaho. Brightfield illumination.
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In vivo portartit of slightly compressed volvocid flagellate, Volvulina steinii Playfair,1915 showing the two contractile vacuoles. The single nucleus of several cells is visible. Only the "anterior" cells of the colony have red eyespots. Collected from a temporary rainwater puddle on a grass lawn in Boise, Idaho. 43°36'49.03" N 116° 13' 23.77" W elev. 2674 ft. March 2006. DIC.
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Lateral view of Gonium pectorale (Muller), a common colonial volvocid flagellate. Colonies usually consist of 16 biflagellate cells (twelve peripheral and four central) in a plate-like arrangement of one layer. An extracellular matrix that is not easily seen connects cells. Cells have a cup-shaped chloroplast with a small anterior stigma. Lateral view of colony. Collected from a freshwater pond near Boise, Idaho. Brightfield
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In vivo surface view of the volvocid flagellate, Volvulina steinii Playfair,1915. Collected from a temporary rainwater puddle on a grass lawn in Boise, Idaho 43° 36' 49.03" N 116° 13' 23.77" W elev. 2674 ft. March 2006. DIC.
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Anterior apical view of Gonium pectorale (Muller), a common colonial volvocid flagellate. Colonies usually consist of 16 biflagellate cells (twelve peripheral and four central) in a plate-like arrangement of one layer. An extracellular matrix (not easily seen without phase or differential intereference contrast techniques) connects cells. Cells have a cup-shaped chloroplast with a small anterior stigma. Collected from a freshwater pond near Boise, Idaho. DIC.
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Anterior apical view of Gonium pectorale (Muller), a common colonial volvocid flagellate. Colonies usually consist of 16 biflagellate cells (twelve peripheral and four central) in a plate-like arrangement of one layer. An extracellular matrix that is not easily seen connects cells. Cells have a cup-shaped chloroplast with a small anterior stigma. Lateral view of colony. Collected from a freshwater pond near Boise, Idaho. DIC.
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Young colonies, cell divisions are almost over, the flagellae aren't yet fully formed. Scale bar indicates 25 µm. Sample from the Lake Constance (vicinity of Bodman). 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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Eudorina (you-door-ine-a) is a colonial volvocid - motile green alga. In this case 16 cells are embedded in a sphere of common mucus. Each individual cell has two flagella, and a cup-shaped chloroplast - a bit like a Chlamydomonas cell. There are a number of related genera which form colonies using mucus as a common matrix, but they differ in the numbers of cells involved, how tightly packed they are, and the shape of the colony. Differential interference contrast.
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Eudorina (you-door-ine-a) is a colonial volvocid - motile green alga. In this case 16 cells are embedded in a sphere of common mucus. Each individual cell has two flagella, and a cup-shaped chloroplast - a bit like a Chlamydomonas cell. There are a number of related genera which form colonies using mucus as a common matrix, but they differ in the numbers of cells involved, how tightly packed they are, and the shape of the colony. This image illustrates the way that a daughter colony of tightly packed cells is formed within a parental colony. Phase contrast.
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Eudorina (you-door-ine-a) is a colonial volvocid - motile green alga. In this case 16 cells are embedded in a sphere of common mucus. Each individual cell has two flagella, and a cup-shaped chloroplast - a bit like a Chlamydomonas cell. There are a number of related genera which form colonies using mucus as a common matrix, but they differ in the numbers of cells involved, how tightly packed they are, and the shape of the colony. This image illustrates the flagella very well Phase contrast.
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Eudorina, a motile colonial volvocid flagellate. Colonies may be cylindrical, elliptical or spherical as seen in this image. Colonies may be composed of 8 to 128 cells. This colony is composed of 16 individuals embedded in a clear gelatinous matrix. Two equal length flagella protrude through the matrix from each cell. Cells may be arranged in tiers or more randomly as seen here. One large bright green cup-shaped chloroplast. Small red stigma. Sexual and asexual reproduction occurs. From temporary rainwater pool in grass field near Boise, Idaho. Phase contrast.
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Eudorina, a motile colonial volvocid flagellate. Colonies may be cylindrical, elliptical or spherical as seen in this image. Colonies may be composed of 8 to 128 cells. This colony is composed of 16 individuals embedded in a clear gelatinous matrix. Two equal length flagella protrude through the matrix from each cell. Cells may be arranged in tiers or more randomly as seen here. One large bright green cup-shaped chloroplast. Small red stigma. Sexual and asexual reproduction occurs. From temporary rainwater pool in grass field near Boise, Idaho. Brightfield.
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Multilayer image shows mucilaginous envelope, flagellae, structure of chloroplasts and in some cases the stigma. Scale bar indicates 25 µm. Sample from the pond Hegne Moor situated in the vicinity of Lake Constance (Bodensee, Southern Germany). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Eudorina-colony accompanied by cyanobacteria (Anabaeba) and phototrophic eubacteria Pelodictyon (small bluegreen spherules embedded in mucilage). Scale bar indicates 50 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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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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Portrait of Pandorina. Colonial flagellate with bright green chloroplasts. Usually 8-16 cells each with 2 equal-length flagella all enclosed within clear gelatinous envelope. From freshwater pond near Boise, Idaho. Brightfield.
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Pandorina morum is rare in Lake Kinneret. This specimen was collected at the shore by the Kinneret Limnological Laboratory in March 2006.
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DOF image shows the layers of the mucilaginous sheath, several flagellae and stigmae of two cells. Scale bar indicates 25 µm. Sample from sphagnum pond situated in the northern alpine region of Austria near Salzburg. Images were 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).