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Dark ground image of colony, with daughter colonies enclosed within.
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Draparnaldia (drap-arn-all-dee-a) is a green alga in which filaments are formed in whorls around a central but branching thread. Usually with mucus material surrounding the filaments. Differential interference contrast.
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Draparnaldia (drap-arn-all-dee-a) is a green alga in which filaments are formed in whorls around a central but branching thread. Usually with mucus material surrounding the filaments. This detail shows the fine filaments attached to the central thread. The cellulosic walls and thin peripheral band-shaped plastid evident in the central thread. Phase contrast.
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Draparnaldia (drap-arn-all-dee-a) is a green alga in which filaments are formed in whorls around a central but branching thread. Usually with mucus material surrounding the filaments. Dark ground illumination.
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Asteromonas (ass-tear-owe-moan-ass) gracilis, a volvocalean green alga - a group more usually associated with freshwater habitats. With grass green chloroplast with cup-shape (mostly located at base of cells but extending up along the sides), two polar flagella, and starch-enclosed pyrenoid appearing as a disc near posterior end. Cell usually with 6 surface ridges. Differential interference microscopy.
data on this strain.
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Asteromonas (ass-tear-owe-moan-ass) gracilis, a volvocalean green alga - a group more usually associated with freshwater habitats. With grass green chloroplast with cup-shape (mostly located at base of cells but extending up along the sides), two polar flagella, and red/brown eyespot or stigma. Cell usually with 6 surface ridges. Differential interference microscopy.
data on this strain.
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Dunaliella (done-al-ee-ell-a) tertiolecta, one of the marine volvocid flagellates with two similar flagella inserted at the apex of the cell. No wall or theca. Eyespot to the left. Often found in salt marshes or sites of high salinity, some species in this genus produce carotenes and are farmed commercially for these compounds. Phase contrast.
data on this strain.
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Dunaliella (done-al-ee-ell-a) tertiolecta, one of the marine volvocid flagellates with two similar flagella inserted at the apex of the cell. No wall or theca. Eyespot to the right. Cup-shaped green chloroplast. Often found in salt marshes or sites of high salinity, some species in this genus produce carotenes and are farmed commercially for these compounds. Differential interference microscopy.
data on this strain.
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Phase contrast image of ATCC 30929.
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Phase contrast image of ATCC 30929.
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Leptosiropsis (leapt-owe-sire-op-sis) torulosa, green alga with organic wall that is produced in layers. Phase contrast microscopy.
data on this strain.
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Leptosiropsis (leapt-owe-sire-op-sis) torulosa, green alga with organic wall that is produced in layers. Phase contrast microscopy.
data on this strain.
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Leptosiropsis (leapt-owe-sire-op-sis) torulosa, green alga with organic wall that is produced in layers. Phase contrast microscopy.
data on this strain.
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Leptosiropsis (leapt-owe-sire-op-sis) torulosa, green alga with organic wall that is produced in layers. Phase contrast microscopy.
data on this strain.
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Kirchneriella (keyrsh-ner-ell-a) in which cells occur individually (particularly in cultures) or in colonies 4-16, rarely more, cells within gelatinous sheaths. Cells oval or oblong cylindrically, curved or screw-shaped curved. Both ends of the cells are rounded. A single chloroplast covers the inside of the cell and contains a single pyrenoid. The nucleus is located centrally near the concavity of the cell. Common in plankton of fresh water in lakes, ponds and rivers. This slightly squashed colony of Kirchneriella lunaris was collected in the plankton from Lake Constance, Germany. Cells average 16 - 19 (microns long. Cells are bent or moon shaped. Differential interference contrast.
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Kirchneriella (keyrsh-ner-ell-a) in which cells occur individually (particularly in cultures) or in colonies 4-16, rarely more. Cells live within gelatinous sheaths. Cells oval or oblong cylindrically, curved or screw-shaped curved. Both ends of the cells are rounded. A single chloroplast covers the inside of the cell and contains a single pyrenoid. The nucleus is located centrally near the concavity of the cell. Common in plankton of fresh water in lakes, ponds and rivers. This slightly squashed colony of Kirchneriella obesa was collected in the plankton from Lake Constance, Germany; cells measure 8 - 14 microns long. With an U-shaped incision. Differential interference contrast.
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Pediastrum braunii.
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Pediastrum cruciatum.
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Pediastrum elegans.
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Pediastrum ellipticum.
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Pediastrum octonum.