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San Martn de Castaeda, Castilla y Len, Espaa
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Ceratium (serr-at-ee-um) longipes, a representative of a large and distinctive genus of marine autotrophic dinoflagellates - made distinctive by having one anterior projection and two or as in this case three, posterior horns. Phase contrast microscopy.
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Ceratium (serr-ate-ee-um), dinoflagellate, the chloroplasts of which are evident because they emit red light when illuminated with intense UV light. The UV light is filtered out so that only the red fluorescence is visible. This is a dinoflagellate. Fluorescence microscopy image by Dave Caron.
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Ceratium cornutum.
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The epicone of this species showing the typically curved anterior horn, with its open end. The hypocone is seen extending into two asymmetric posterior horns, whose ends are pointed and closed. The circumferential flagellum (cannot be seen in the picture) lies in the well visible cingulum, a circular , equatorial groove. The longitudinal flagellum, passing through the sulcus, is seen between the posterior horns. Some of the borders between the plates of the specimen are recognizable. The complete tabulation of the species (not visible in picture) is said to consist of 16 plates, 9 on the epicone, 7 on the hypocone. The cellulose-containing plates are perforated by numerous pores, some of which discernible in the image.
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Portrait of the dinoflagellate, Ceratium hirundinella (O.F. Müller) Schrank, 1882. The body is drawn out into a long anterior horn and three subequal posterior horns at angles to one another. The transverse girdle or cingulum bears a flagellum (not seen in this image), which differs structurally from the trailing flagellum (seen here between the right and central posterior horns). Complex faceted cellulose plates cover the body. Small discoid plastids contain chlorophyll a and c along with other pigments, which may give a yellow-brown or brownish-red color. Composite image. Collected from freshwater pond near Boise, Idaho September 2003. DIC optics.
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Ceratium hirundinella is one of the larger dinoflagellates (length ~ 400 μm) occurring in Lake Kinneret. It is easily identified by its typical 3 or 4 horns of varying length and overall shape reminiscent of the Eiffel tower. It is abundant in spring, when it accompanies the more abundant dinoflagellate Peridinium gatunense at its bloom decline phase. At this time of year other, smaller dinoflagellates are also present in the water column (Peridiniopsis elpatiewsky, Ps. cunningtonii, Ps. borgei, Ps. polonicum). While usually less abundant than the other dinoflagellates, it produces a large number of cysts (resting spores) that sink to the sediments. An exceptional bloom of Ceratium occurred in spring 1993 when cell densities in the upper 0-2 m layer reached 150/mL.
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Cysts of Ceratium are found in the water column during the exponential growth phase and sink to the sediments. Their shape is typical, with 3 horns and at least one red spot. The specimen was sampled from shallow water near the Kinneret Limnological Laboratory in April 2006.
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Ceratium hirundinella is one of the larger dinoflagellates (length ~ 400 μm) occurring in Lake Kinneret. It is easily identified by its typical 3 or 4 horns of varying length and overall shape reminiscent of the Eifel tower. It is abundant in spring, when it accompanies the more abundant dinoflagellate Peridinium gatunense at its bloom decline phase. At this time of year other, smaller dinoflagellates are also present in the water column (Peridiniopsis elpatiewsky, Ps. cunningtonii, Ps. borgei, Ps. polonicum). While usually less abundant than the other dinoflagellates, it produces a large number of cysts (resting spores) that sink to the sediments. An exceptional bloom of Ceratium occurred in spring 1993 when cell densities in the upper 0-2 m layer reached 150/mL.
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Cysts of Ceratium hirundinella are found in the water column during the exponential growth phase and sink to the sediments. Their shape is typical, with 3 horns and at least one red spot. The specimen was sampled from shallow water near the Kinneret Limnological Laboratory in April 2006.
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Dividing cell of Ceratium hirundinella (Dinoflagellata), and a second cell with a abnormal horn, pointed in the "wrong" direction
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Sampling date 10/2018. Scale bars indicate 25 µm.Place name: Pond near the Bodden bay Schwarzer Peter, Hiddensee (German Baltic Sea) Latitude: 54.514946 Longitude: 13.082471Microscope Zeiss Universal, 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
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Sampling date 09/2011. Scale bars indicate 50 µm.Two images with different focal planes.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: Lake Constance vicinity of Bodman (Germany) Latitude: 47.796494 Longitude: 9.047656Microscope Zeiss Universal, camera Olympus C7070WZ. 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
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Sampling date 09/2011. Scale bars indicate 50 µm.Two images with different focal planes.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: Lake Constance vicinity of Bodman (Germany) Latitude: 47.796494 Longitude: 9.047656Microscope Zeiss Universal, camera Olympus C7070WZ. 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
