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Raphidocystis tubifera (Penard, 1904), a centrohelid heliozoan. The periplast is composed of 3 types of siliceous elements: elliptical tangential plate scales, long radial trumpet-like scales and short, broad radial funnel-shaped scales. The latter two types are seen well in this image at the upper margin of the periplast. The tangential elements are difficult to see. The long axopodia and their extrusomes are visible on the viewer's right in this image. Although species identification rests on EM morphology of the tangential plate scales, the organisms in these images conform to the description of R. tubifera (Mikrjukov,K.A. Arch. Protistenkd. 147: 205-212). From slow flowing organically enriched freshwater stream near Boise, Idaho. Phase contrast.
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Raphidocystis tubifera (Penard, 1904), a centrohelid heliozoan. The periplast is composed of 3 types of siliceous elements: elliptical tangential plate scales, long radial trumpet-like scales and short, broad radial funnel-shaped scales. The latter two types are seen well in this image at the upper margin of the periplast. The tangential elements are difficult to see. The long axopodia and their extrusomes are visible at 12 o'clock in this image. Zoochlorellae are seen in the cytoplasm. Although species identification rests on EM morphology of the tangential plate scales, the organisms in these images conform to the description of R. tubifera (Mikrjukov,K.A. Arch. Protistenkd. 147: 205-212). From slow flowing organically enriched freshwater stream near Boise, Idaho. Differential interference contrast.
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Raphidocystis tubifera (Penard, 1904).DIC.
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Raphidocystis tubifera (Penard, 1904). Phase contrast.
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Raphidocystis tubifera (Penard, 1904). DIC.
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This centrohelid heliozoan is characterized by trumpet shaped siliceous skeleton elements. This specimen shows the enormous food vacuole production (funnel-shaped pseudopod) preceding the ingestion process. Further pictures in ZIP archive show steps of ingestion. Collected from littoral region (stand of Phragmites) of a rain storage reservoir in Kiel (Schleswig-Holstein, Germany). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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[taxonomy:genus=Raphidocystis]
Water collected from Kent Ridge Park pond on 23 Aug 2011.
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Description: English: Acanthocystis turfacea, Carter. a, probably the central nucleus; b, clear protoplasm around the nucleus; c, more superficial protoplasm with vacuoles and chlorophyll corpuscles; d, coarser siliceous spicules; e, finer forked siliceous spicules; f, finely granular layer of protoplasm. The long pseudopodia reaching beyond the spicules are not lettered. Date: 1911. Source: Fig. 5 of
File:EB1911_Heliozoa_(1).jpg (extract). Original source: “Heliozoa,” Encyclopædia Britannica (11th ed.), v. 13, 1911, p. 232, fig. 1. Author: Marcus Manuel Hartog. Other versions:
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Description: English: Bi-flagellate “flagellula” of Acanthocystis aculeata. a, nucleus. Date: 1911. Source: Fig. 6 of
File:EB1911_Heliozoa_(1).jpg (extract). Original source: “Heliozoa,” Encyclopædia Britannica (11th ed.), v. 13, 1911, p. 232, fig. 1. Author: Marcus Manuel Hartog.
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Sphaerastrum fockii Synonym: Heterophrys fockii.Scale bar indicates 25 µm. Sample from a small wetland near Schladming (northern alpine region of Austria near Salzburg). 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: Wetland near Schladming (Austria) Latitude: 47.37386 Longitude: 13.823016 Synonym: Heterophrys fockii.Der Messbalken markiert eine Länge von 50 µm. Probe aus einer Wiesenvernässung nahe Schladming/Österreich. 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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Raphidiophrys coerulea Scale bar indicates 25 µm. Sample from a pond situated in the vicinity of Lake Constance. 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: Pond situated in the vicinity of Lake Constance (Germany) Latitude: 47.734945 Longitude: 9.091097 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 25 µm. Probe aus einem Teich in der Nähe des Bodensees. 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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Raphidocystis tubifera This centrohelid heliozoan is characterized by trumpet shaped siliceous skeleton elements. This specimen shows the enormous food vacuole production (funnel-shaped pseudopod) preceeding the ingestion process. Collected from littoral region (reed belt by Phragmites) of a rain storage reservoir in Kiel (Schleswig-Holstein, Germany). 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: Pond Demühlen, rain storage reservoir in Kiel-Russee (Schleswig-Holstein, Germany) Latitude: 54.304095 Longitude: 10.086073 Dieses Sonnentierchen der Gruppe Centrohelidae ist charakterisiert durch trompetenförmige Kieselnadeln. Dieses Exemplar zeigt die Ausbildung eines enorm großen trichterförmigen Pseudopodiums), welches die Beute umfließt und danach die Nahrungsvakuole bildet. Aus der von Schilf bewachsenen Uferzone eines Regenrückhaltebeckens in Kiel. 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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Choanocystis perpusilla Scale bar indicates 25 µm.Sample from the wetland Seekamper Seewiesen in Schilksee (Kiel, Germany). 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: Wetland Seekamper Seewiesen in Schilksee (Kiel, Germany) Latitude: 54.410447 Longitude: 10.159699 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 25 µm. Probe aus Feuchtbiotop Seekamper Seewiesen bei Schilksee/Kiel. 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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Acanthocystis pectinata The picture shows the two types of actinomorphic siliceous spines (the shorter type is forked, see inset top right) and the tangential scales. Nucleus is clearly shown together with some food vacuoles. Scale bar indicates 25 µm. Sample from sphagnum pond Dosenmoor near Neumuenster (Schleswig-Holstein. 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: Bog Dosenmoor near Neumuenster (Schleswig-Holstein, Germany) Latitude: 54.136219 Longitude: 10.026433 Das Bild zeigt die beiden Arten der radiären kieselsäurehaltigen Stacheln (der kürzer Typ ist gegabelt, siehe Kasten oben rechts) und die tangentialen Kieselschuppen. Der Zellkern ist deutlich zu sehen, zusammen mit einigen Nahrungsvakuolen. Der Messbalken markiert eine Länge von 25 µm. Probe aus dem Dosenmoor in der Nähe von Neumünster. 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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Choanocystis aculeata Scale bar indicates 25 µm. The specimen was gathered in the wetlands of Nationalpark Unteres Odertal (100 km north east of Berlin). Sampling date 5/2019. 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: Creek in Oder valley 100 km north east of Berlin (Germany) Latitude: 53.135032 Longitude: 14.348738 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 25 µm. Probe aus einem Feuchtbiotop im Nationalpark Unteres Odertal auf halber Strecke zwischen Schwedt und Gartz. Datum der Aufsammlung: 7/2019. 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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Choanocystis aculeata Spicula of Choanocystis aculeate. Scale bar indicates 10 µm. The specimen was gathered in the wetlands of Nationalpark Unteres Odertal (100 km north east of Berlin). Sampling date 5/2019. 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: Creek in Oder valley 100 km north east of Berlin (Germany) Latitude: 53.135032 Longitude: 14.348738 Kieselschuppe (Spicula) von Choanocystis aculeate. Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 10 µm. Probe aus einem Feuchtbiotop im Nationalpark Unteres Odertal auf halber Strecke zwischen Schwedt und Gartz. Datum der Aufsammlung: 7/2019. 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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Choanocystis aculeata Scale bar indicates 25 µm. The specimen was gathered in the wetlands of Nationalpark Unteres Odertal (100 km north east of Berlin). Sampling date 5/2019. 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: Creek in Oder valley 100 km north east of Berlin (Germany) Latitude: 53.135032 Longitude: 14.348738 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 25 µm. Probe aus einem Feuchtbiotop im Nationalpark Unteres Odertal auf halber Strecke zwischen Schwedt und Gartz. Datum der Aufsammlung: 7/2019. 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.