Euastrum Ehrenberg ex Ralfs 1848

Euastrum crassum (BREB.) KÜTZ. The cells are almost two times longer than wide and rounded rectangular in shape. The lateral lobes are broad and rounded off flat concave. The vertex lobes are short and strongly broadened towards the flat recessed ends. They are separated form the lateral lobes only by shallow cuts. The central cuts aren’t broadened towards the periphery. At the base of the cell halves there are three swellings with a big pore at their center.  Dimension: Length 150 – 200 µm, width 75 – 90 µm  Ecology: Acidophilic alga (pH 4 – 6.5), common in shallow sphagnum ponds. Occurrence: Probably ubiquitous 

Euastrum crassum (BREB.) KÜTZ. The cells are almost two times longer than wide and rounded rectangular in shape. The lateral lobes are broad and rounded off flat concave. The vertex lobes are short and strongly broadened towards the flat recessed ends. They are separated form the lateral lobes only by shallow cuts. The central cuts aren’t broadened towards the periphery. At the base of the cell halves there are three swellings with a big pore at their center.  Dimension: Length 150 – 200 µm, width 75 – 90 µm  Ecology: Acidophilic alga (pH 4 – 6.5), common in shallow sphagnum ponds. Occurrence: Probably ubiquitous 

Euastrum germanicum (SCHMIDLE) WILLI KRIEG. he cells are only a little longer then wide. The cell halves constist of five broadly rounded lobes. The vertex lobes which are outward somewhat widened are separated from the lobes by extended, inside rounded recessings. Each center of the cell halves showes a hemispheric bump. The cellwall is covered with parallel rows of spines. The central cuts are slender and broadly opened towards the periphery.  Dimension: Length 50 – 60 µm, width 40 – 50 µm  Ecology: Especially in medium acidic to weakly alcaline waters of ponds and alluvial areas (Danube meadows) Occurrence: Mainly in Europe, but probably ubiquitous 

Euastrum germanicum (SCHMIDLE) WILLI KRIEG. The cells are only a little longer then wide. The cell halves constist of five broadly rounded lobes. The vertex lobes which are outward somewhat widened are separated from the lobes by extended, inside rounded recessings. Each center of the cell halves showes a hemispheric bump. The cellwall is covered with parallel rows of spines. The central cuts are slender and broadly opened towards the periphery.  Dimension: Length 50 – 60 µm, width 40 – 50 µm  Ecology: Especially in medium acidic to weakly alcaline waters of ponds and alluvial areas (Danube meadows) Occurrence: Mainly in Europe, but probably ubiquitous 

Euastrum intermedium CLEVE The celles are almost two times longer than wide. The cell sides are loboid broadly rounded. The vertex lobes are protruding clearly, broadened on the ends and with a cut in the middle. In the center of the cell halves there are pairs of bumps which are covered with small warts. The central cuts are far opened towards the periphery.    Dimension: Length 70 – 80 µm, width 35 – 45 µm Ecology: Acidophilic alga, rather rare in shallow waters between sphagnum. Occurrence: Ubiquitous, prefers boreal areas (mountains), rather rare in Central Europe. 

Euastrum intermedium CLEVE The celles are almost two times longer than wide. The cell sides are loboid broadly rounded. The vertex lobes are protruding clearly, broadened on the ends and with a cut in the middle. In the center of the cell halves there are pairs of bumps which are covered with small warts. The central cuts are far opened towards the periphery.    Dimension: Length 70 – 80 µm, width 35 – 45 µm Ecology: Acidophilic alga, rather rare in shallow waters between sphagnum. Occurrence: Ubiquitous, prefers boreal areas (mountains), rather rare in Central Europe. 

Sampling date 06/2023. Scale bars indicate 100 µm (1), 25 µm (2–4), 50 µm (5).Five images.First:Overview.Second:Synoptic representation of the cell surface.Third:Optical cross section through the chloroplasts.Fourth:Optical cross section through the chloroplasts showing pyrenoids and storage crystals.Fifth:Optical cross section through the chloroplasts showing cell nucleus.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bars indicate 100 µm (1), 25 µm (2–4), 50 µm (5).Five images.First:Overview.Second:Synoptic representation of the cell surface.Third:Optical cross section through the chloroplasts.Fourth:Optical cross section through the chloroplasts showing pyrenoids and storage crystals.Fifth:Optical cross section through the chloroplasts showing cell nucleus.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bars indicate 100 µm (1), 25 µm (2–4), 50 µm (5).Five images.First:Overview.Second:Synoptic representation of the cell surface.Third:Optical cross section through the chloroplasts.Fourth:Optical cross section through the chloroplasts showing pyrenoids and storage crystals.Fifth:Optical cross section through the chloroplasts showing cell nucleus.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bars indicate 100 µm (1), 25 µm (2–4), 50 µm (5).Five images.First:Overview.Second:Synoptic representation of the cell surface.Third:Optical cross section through the chloroplasts.Fourth:Optical cross section through the chloroplasts showing pyrenoids and storage crystals.Fifth:Optical cross section through the chloroplasts showing cell nucleus.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bars indicate 100 µm (1), 25 µm (2–4), 50 µm (5).Five images.First:Overview.Second:Synoptic representation of the cell surface.Third:Optical cross section through the chloroplasts.Fourth:Optical cross section through the chloroplasts showing pyrenoids and storage crystals.Fifth:Optical cross section through the chloroplasts showing cell nucleus.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bar indicates 25 µm.Synoptic representation of the cell surface.Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF image.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bars indicate 10 µm.Three images.First:Optical cross-section through the chloroplasts showing storage substances (crystals).Second:Optical cross section through the chloroplasts showing pyrenoids.Third:Optical cross section through the cell showing Chloroplasts with pyrenoids and cell nucleus.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bars indicate 10 µm.Three images.First:Optical cross-section through the chloroplasts showing storage substances (crystals).Second:Optical cross section through the chloroplasts showing pyrenoids.Third:Optical cross section through the cell showing Chloroplasts with pyrenoids and cell nucleus.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bars indicate 10 µm.Three images.First:Optical cross-section through the chloroplasts showing storage substances (crystals).Second:Optical cross section through the chloroplasts showing pyrenoids.Third:Optical cross section through the cell showing Chloroplasts with pyrenoids and cell nucleus.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Description: The cells are appr. 1.4–1.6 times longer than wide and trapezoidal in shape. The cell sides are formed by flat depressions from two distinct waves.The vertex lobes are clearly separated, strongly broadened towards the ends. They have a central cut with a spine each on the sides. The central cut of the cell is narrow, the cell wall is covered with warts and denticles.Dimension: Length (45)–58–75 µm, width (28)–42–52 µm.Occurrence: Rather rare, most of the reported finds are in northern areas and higher altitudes. Sporadic in medium acidic waters of fens and moorlands.Left: Original graphic by Prof. Lenzenweger.Right: Photomicrograph by Prof. Lenzenweger. For microphotography, the microscope illumination was adjusted in such a way that as many features as possible that are important for species identification are prominently displayed.Copyright by Prof. Rupert Lenzenweger, Ried im Innkreis, Austria.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Description: The cells are appr. 1.4–1.6 times longer than wide and trapezoidal in shape. The cell sides are formed by flat depressions from two distinct waves.The vertex lobes are clearly separated, strongly broadened towards the ends. They have a central cut with a spine each on the sides. The central cut of the cell is narrow, the cell wall is covered with warts and denticles.Dimension: Length (45)–58–75 µm, width (28)–42–52 µm.Occurrence: Rather rare, most of the reported finds are in northern areas and higher altitudes. Sporadic in medium acidic waters of fens and moorlands.Left: Original graphic by Prof. Lenzenweger.Right: Photomicrograph by Prof. Lenzenweger. For microphotography, the microscope illumination was adjusted in such a way that as many features as possible that are important for species identification are prominently displayed.Copyright by Prof. Rupert Lenzenweger, Ried im Innkreis, Austria.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Description: The cells are only a little longer then wide. The cell halves constist of five broadly rounded lobes. The vertex lobes which are outward somewhat widened are separated from the lobes by extended, inside rounded recessings. Each center of the cell halves showes a hemispheric bump. The cell wall is covered with parallel rows of spines. The central cuts are slender and broadly opened towards the periphery.Dimension: Length (45)–50–60–(75?) µm, width (36)–42–54–(64?) µm, L/W (1.05)–1.1–1.2–(1.25).Occurrence: Especially in medium acidic to weakly alcaline waters of ponds and alluvial areas (Danube meadows).Mainly in Europe found, but probably ubiquitous.Left: Original graphic by Prof. Lenzenweger.Right: Photomicrograph by Prof. Lenzenweger. For microphotography, the microscope illumination was adjusted in such a way that as many features as possible that are important for species identification are prominently displayed.Copyright by Prof. Rupert Lenzenweger, Ried im Innkreis, Austria.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Description: The cells are only a little longer then wide. The cell halves constist of five broadly rounded lobes. The vertex lobes which are outward somewhat widened are separated from the lobes by extended, inside rounded recessings. Each center of the cell halves showes a hemispheric bump. The cell wall is covered with parallel rows of spines. The central cuts are slender and broadly opened towards the periphery.Dimension: Length (45)–50–60–(75?) µm, width (36)–42–54–(64?) µm, L/W (1.05)–1.1–1.2–(1.25).Occurrence: Especially in medium acidic to weakly alcaline waters of ponds and alluvial areas (Danube meadows).Mainly in Europe found, but probably ubiquitous.Left: Original graphic by Prof. Lenzenweger.Right: Photomicrograph by Prof. Lenzenweger. For microphotography, the microscope illumination was adjusted in such a way that as many features as possible that are important for species identification are prominently displayed.Copyright by Prof. Rupert Lenzenweger, Ried im Innkreis, Austria.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bars indicate 25 µm (1, 3–5), 10 µm (2).Five images.First:Synoptic representation of the upper cell wall.Second:Detail: Representation of the pores (arrow) in the cell wall through which the protective mucus is secreted.Third:Optical cross-section through the chloroplasts showing parts of the lobed chloroplast and storage substances (oil droplets and crystals).Fourth:The optical cross section through the cell shows parts of the lobed chloroplast and storage substances (crystals).Fifth:The optical cross section through the cell shows pyrenoids and storage substances (crystals). In the pyrenoids, the cell produces the storage substance starch, which is deposited as a shell around them, which can be clearly seen here.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bars indicate 25 µm (1, 3–5), 10 µm (2).Five images.First:Synoptic representation of the upper cell wall.Second:Detail: Representation of the pores (arrow) in the cell wall through which the protective mucus is secreted.Third:Optical cross-section through the chloroplasts showing parts of the lobed chloroplast and storage substances (oil droplets and crystals).Fourth:The optical cross section through the cell shows parts of the lobed chloroplast and storage substances (crystals).Fifth:The optical cross section through the cell shows pyrenoids and storage substances (crystals). In the pyrenoids, the cell produces the storage substance starch, which is deposited as a shell around them, which can be clearly seen here.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bars indicate 25 µm (1, 3–5), 10 µm (2).Five images.First:Synoptic representation of the upper cell wall.Second:Detail: Representation of the pores (arrow) in the cell wall through which the protective mucus is secreted.Third:Optical cross-section through the chloroplasts showing parts of the lobed chloroplast and storage substances (oil droplets and crystals).Fourth:The optical cross section through the cell shows parts of the lobed chloroplast and storage substances (crystals).Fifth:The optical cross section through the cell shows pyrenoids and storage substances (crystals). In the pyrenoids, the cell produces the storage substance starch, which is deposited as a shell around them, which can be clearly seen here.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bars indicate 25 µm (1, 3–5), 10 µm (2).Five images.First:Synoptic representation of the upper cell wall.Second:Detail: Representation of the pores (arrow) in the cell wall through which the protective mucus is secreted.Third:Optical cross-section through the chloroplasts showing parts of the lobed chloroplast and storage substances (oil droplets and crystals).Fourth:The optical cross section through the cell shows parts of the lobed chloroplast and storage substances (crystals).Fifth:The optical cross section through the cell shows pyrenoids and storage substances (crystals). In the pyrenoids, the cell produces the storage substance starch, which is deposited as a shell around them, which can be clearly seen here.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 06/2023. Scale bars indicate 25 µm (1, 3–5), 10 µm (2).Five images.First:Synoptic representation of the upper cell wall.Second:Detail: Representation of the pores (arrow) in the cell wall through which the protective mucus is secreted.Third:Optical cross-section through the chloroplasts showing parts of the lobed chloroplast and storage substances (oil droplets and crystals).Fourth:The optical cross section through the cell shows parts of the lobed chloroplast and storage substances (crystals).Fifth:The optical cross section through the cell shows pyrenoids and storage substances (crystals). In the pyrenoids, the cell produces the storage substance starch, which is deposited as a shell around them, which can be clearly seen here.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Wetland Lauchseemoor, Fieberbrunn (Tyrol, Austria)Latitude: 47.46954439     Longitude: 12.53826499Microscope Zeiss Axioplan, camera Olympus OM-D M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page