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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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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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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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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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