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Cosmarium (coz-mare-ee-um) tetraophthalmum is a very common and large genus of phytoplankton alga found usually in oligotrophic, acid waters. The cells of this genus are composed of two semi-cells, constricted in the middle. This region in the middle is called the isthmus and is the site of the nucleus. The outer portions of each semi cell contains a single, large chloroplast. The outer cell wall of each semi-cell are covered with pores and can be very ornate and the appearance can be used to define the species. The cells are move slowly as the result of mucilage secretion. Both asexual and sexual reproduction occurs. The asexual activity is cell division and the sexual reproduction involves the formation of zygospores. The gametes migrate from the parental cell walls through pores and fuse in a region midway between the parental walls. The zygote can form a very ornate wall. This specimen was collected in a moor located in the Salzburger Land, Austria.
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Soba, Cantabria, Spain
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Cosmarium (coz-mare-ee-um) tetraophthalmum is a very common and large genus of phytoplankton alga found usually in oligotrophic, acid waters. The cells of this genus are composed of two semi-cells, constricted in the middle. This region in the middle is called the isthmus and is the site of the nucleus. The outer portions of each semi cell contains a single, large chloroplast. The outer cell wall of each semi-cell are covered with pores and can be very ornate and the appearance can be used to define the species. The cells are move slowly as the result of mucilage secretion. Both asexual and sexual reproduction occurs. The asexual activity is cell division and the sexual reproduction involves the formation of zygospores. The gametes migrate from the parental cell walls through pores and fuse in a region midway between the parental walls. The zygote can form a very ornate wall. Focal plane on the cell wall covered with pores and conical granules. This specimen was collected in a moor located in the Salzburger Land, Austria. Differential interference contrast.
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Soba, Cantabria, Spain
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Cosmarium tetraophthalmum BREB. in RALFS The cells are 1.5 times longer than wide and trapezoid in shape, the cell terminations are truncated. The cell wall is covered with scattered standing warts. The central cuts are deep and strongly broadened towards the periphery. Dimension: Length 100 â 120 µm, width 60 â 80 µm Ecology: Very adaptable alga, in medium acidic up to alcaline waters Occurrence: Ubiquitous, often abundant
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Ribadelago, Castille and Leon, Spain
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Cosmarium tetraophthalmum BREB. in RALFS The cells are 1.5 times longer than wide and trapezoid in shape, the cell terminations are truncated. The cell wall is covered with scattered standing warts. The central cuts are deep and strongly broadened towards the periphery. Dimension: Length 100 â 120 µm, width 60 â 80 µm Ecology: Very adaptable alga, in medium acidic up to alcaline waters Occurrence: Ubiquitous, often abundant
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Soba, Cantabria, Spain
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Matalebreras, Castille and Leon, Spain
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Vitoria, Basque Country, Spain
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Soba, Cantabria, Spain
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Vitoria, Basque Country, Spain
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Cosmarium tetraophthalmum BREB. in RALFS The cells are 1.5 times longer than wide and trapezoid in shape, the cell terminations are truncated. The cell wall is covered with scattered standing warts. The central cuts are deep and strongly broadened towards the periphery. Dimension: Length 100 120 µm, width 60 80 µm.Ecology: Very adaptable alga, in medium acidic up to alcaline waters.Occurrence: Ubiquitous, often abundant.Copyright by Prof. Rupert Lenzenweger, Ried im Innkreis, Austria. Place name: n. a. Latitude: 0 Longitude: 0 Die Zellen sind etwa 1,5 mal so lang wie breit und im groben Umriss trapezförmig, die Zellenden abgestutzt. Die Zellwand ist mit zerstreut stehenden Warzen besetzt. Die Mitteleinschnitte sind tief, nach außen stark erweitert. Dimensionen:100 120 µm, Breite 60 80 µm.Ökologie: Sehr anpassungsfähige Alge, sowohl in schwach sauren und alkalischen Gewässern. Verbreitung: Weltweit, oft massenhaft. Copyright by Prof. Rupert Lenzenweger, Ried im Innkreis, Österreich. For permission to use of (high-resolution) images please contact postmaster@protisten.de.
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Cosmarium tetraophthalmum BREB. in RALFS The cells are 1.5 times longer than wide and trapezoid in shape, the cell terminations are truncated. The cell wall is covered with scattered standing warts. The central cuts are deep and strongly broadened towards the periphery. Dimension: Length 100 120 µm, width 60 80 µm.Ecology: Very adaptable alga, in medium acidic up to alcaline waters.Occurrence: Ubiquitous, often abundant.Copyright by Prof. Rupert Lenzenweger, Ried im Innkreis, Austria. Place name: n. a. Latitude: 0 Longitude: 0 Die Zellen sind etwa 1,5 mal so lang wie breit und im groben Umriss trapezförmig, die Zellenden abgestutzt. Die Zellwand ist mit zerstreut stehenden Warzen besetzt. Die Mitteleinschnitte sind tief, nach außen stark erweitert. Dimensionen:100 120 µm, Breite 60 80 µm.Ökologie: Sehr anpassungsfähige Alge, sowohl in schwach sauren und alkalischen Gewässern. Verbreitung: Weltweit, oft massenhaft. Copyright by Prof. Rupert Lenzenweger, Ried im Innkreis, Österreich. For permission to use of (high-resolution) images please contact postmaster@protisten.de.