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Description: English: Asterionella formosa collected in La Pêche, Québec. Date: 5 November 2021. Source: Own work. Author:
Mosbo6.
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Description: English: Asterionella formosa infected with Zygorhizidium planktonicum Upper right colonie of four cells is uninfected Lower left colonie of two cells is infected, the lower cell has four sporangia in different levels of maturity. In the upper left cornor is a free swimming zoospore of the fungus. Nederlands: Asterionella besmet met een schimmel. De kolonie rechts boven is niet besmet. De kolonie links onder heeft een cel met vier sporendoosjes. In de linker bovenhoek is een vrijzwemmende zoospoor. Date: 4 May 2009. Source: Own work. Author:
Suusjeq.
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Longitude (deg): -2.1. Latitude (deg): 54.0. Longitude (deg/min): 2° 10' W. Latitude (deg/min): 54° 10' N. Vice county name: Mid-west Yorks. Vice county no.: 64. Country: England. Identified by: Malcolm Storey. Comment: Colonies in plankton sample. Other taxa shown: Infected with chytrid: Rhizophydium planktonicum. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 72.
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Longitude (deg): -2.1. Latitude (deg): 54.0. Longitude (deg/min): 2° 10' W. Latitude (deg/min): 54° 10' N. Vice county name: Mid-west Yorks. Vice county no.: 64. Country: England. Identified by: Malcolm Storey. Comment: Colonies in plankton sample. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 72.
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Longitude (deg): -2.1. Latitude (deg): 54.0. Longitude (deg/min): 2° 10' W. Latitude (deg/min): 54° 10' N. Vice county name: Mid-west Yorks. Vice county no.: 64. Country: England. Identified by: Malcolm Storey. Comment: Colonies in plankton sample. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 72.
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Longitude (deg): -2.1. Latitude (deg): 54.0. Longitude (deg/min): 2° 10' W. Latitude (deg/min): 54° 10' N. Vice county name: Mid-west Yorks. Vice county no.: 64. Country: England. Identified by: Malcolm Storey. Comment: Colonies in plankton sample. Other taxa shown: Heavily infected with chytrid: Rhizophydium planktonicum. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: Canon EOS10D dSLR and Meiji microscope with x2.5 projection eye-piece. DPI defaulting to 72.
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Asterionella spec. Scale bar indicates 50 µm. The specimen was gathered in the Kieler Förde (German Baltic Sea). Sampling date 4/2018. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Axioplan with Olympus OM-D M5 MKII. Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Baltic Sea, Kieler Förde, Kiel Fjord (Germany) Latitude: 54.3894126 Longitude: 10.1749055 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 50 µm. Probe aus der Kieler Förde. Datum der Aufsammlung: 4/2018. Mikrotechnik: Zeiss Axioplan, Kamera: Olympus OM-D M5 MKII. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.
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Asterionella spec. 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). Place name: Lake Constance vicinity of Bodman (Germany) Latitude: 47.796494 Longitude: 9.047656 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 25 µm. Probe aus dem Bodensee in der Nähe von Bodman. Mikrotechnik: Zeiss Universal, Kamera: Olympus C7070. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.
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Asterionella formosa Scale bar indicates 25 µm. Sample from the Lake Vollstedter See near Kiel, Germany. Sampling date 8/2018. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Axioplan with Olympus OM-D M5 MKII. Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Lake Vollstedter See near Kiel (Germany) Latitude: 54.24105528 Longitude: 9.859339 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 25 µm. Probe aus dem Vollstedter See bei Groß Vollstedt. Datum der Aufsammlung: 8/2018. Mikrotechnik: Zeiss Axioplan, Kamera: Olympus OM-D M5 MKII. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.
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Asterionella formosa The specimen was gathered in the lake Schierensee near Kiel (Schleswig-Holstein, Germany). Sampling date 5/2004. Images were taken using Zeiss Standard with Olympus C7070 CCD camera. Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Lake Schierensee near Kiel (Schleswig-Holstein, Germany) Latitude: 54.26256721 Longitude: 9.98369694 Probe aus dem Schierensee bei Kiel. Datum der Aufsammlung: 5/2004. Mikrotechnik: Zeiss Axioplan, Kamera: Olympus OM-D M5 MKII. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.
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Cells are heteropolar with a triangular foot pole which narrows into a thin extension. Cells are connected by the valve faces of the foot poles into chains which are often star-shaped. A. glacialis can form extensive blooms. A. glacialis is a cosmpolitan species.
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of the colonial diatom, Asterionella formosa (Hassall, 1850). The linear frustules have expanded ends. The frustules of the colony are connected by gelatinous cushions at the larger of their two ends in a radial array all in more or less the same plane The yellow chloroplasts are seen here. Blooms of this diatom may impart a disagreeable fishy taste to fresh water. Collected from freshwater pond near Boise, Idaho January 2003. Phase contrast illumination.