Coscinodiscophycidae

Fig 2: Coscinodiscus wailesii Light micrograph of valve face of a live cell

Melosira (mell-o-sigh-ra) is a centric diatom. The cells are like old-style hat boxes, or old-style pill boxes, or like petri-dishes. In Melosira, many cells are joined end to end to create a filament. The less substantial rings on the lower image are where the two halves of the frustule are joined together by the girdle bands, the more visible connections are where two cells are joined together. Each cell has a radial symmetry. As with other diatoms, plastids have chlorophylls a and c and so have a yellow brown colour. The lower picture reveals the individual disc-shaped plastids. Phase contrast.

Melosira (mellow-sire-a) nummuloides, filament forming centric diatom, with multiple small plastids within the cell. Dark ground illumination. Leptosiropsis (leapt-owe-sire-op-sis) torulosa, green alga with organic wall that is produced in layers. Phase contrast microscopy. data on this strain.

Colony with epibiotic bacteria chains. Scale bar indicates 100 µm. The image was built up using several photomicrographic frames with manual stacking technique.  Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera. 

Actinoptychus heliopelta.

Coscinodiscus radiatus.Valvar view. Scale bar indicates 25 m. Sample from North Sea near Heligoland (spring diatom bloom). The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.For more look at www.protisten.de/english/gallery_main/gallery_main.htmlFor high-resolution images please ask postmaster@protisten.de..

Grove, O, Galicia, Spain

Grove, O, Galicia, Spain

Ribadelago de Franco, Castilla y Len, Espaa

Ribadelago de Franco, Castilla y Len, Espaa

Torreblanca I, Catalunya, Espaa

Grvalos, La Rioja, Spain

Described by Stein in 1844. Specimen from the Bay of Villefranche in March 2014. Z-stack of images made using a 40x objective and DIC optics.

Coscinodiscus wailesii.Valvar view. Insets showing marginal ring of labiate processes (upper right) and the hyaline central area (lower left). Scale bar indicates 100 m. Sample from North Sea near Heligoland (spring diatom bloom). The image was built up using several photomicrographic frames with manual stacking and stitching technique. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.For more look at www.protisten.de/english/gallery_main/gallery_main.htmlFor high-resolution images please ask postmaster@protisten.de..

Melosira moniliformis.Colony with epibiotic bacteria chains. Scale bar indicates 25 m. The image was built up using several photomicrographic frames with manual stacking technique. Sample from North Sea near Heligoland (spring diatom bloom). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.For more look at www.protisten.de/english/gallery_main/gallery_main.htmlFor high-resolution images please ask postmaster@protisten.de.

Coscinodiscus radiatus Valvar view. Scale bar indicates 25 µm. Sample from North Sea near Heligoland (spring diatom bloom). 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: North Sea around Heligoland Latitude: 54,186311 Longitude: 7,895034 Schalenansicht. Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 25 µm. Probe aus der Nordsee vor Helgoland in der Zeit der Frühjahrsblüte. 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.

Melosira spec. Scale bar indicates 50 µm. Sample from seaweed meadows from Bodden, the brackish waters lying between the isles of Hiddensee and Ruegen (German Baltic Sea). Sampling date 10/2018. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Standard with Olympus OM-D M5 MKII. Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Hiddensee Bodden (Germany) Latitude: 54,582633 Longitude: 13,115051 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 50 µm. Probe aus den Seegraswiesen im Hiddenseer Bodden. Datum der Aufsammlung: 10/2018. Mikrotechnik: Zeiss Standard, 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.

Aulacoseira spec. Scale bar indicates 10 µm. Sample from the Lake Vollstedter See near Kiel, Germany. Sampling date 9/2019. 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: Lake Vollstedter See near Kiel (Germany) Latitude: 54,24105528 Longitude: 9,859339 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 10 µm. Probe aus dem Vollstedter See bei Groß Vollstedt. Datum der Aufsammlung: 9/2019. 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.

Fig 4: Coscinodiscus wailesii Light micrograph central hyaline area of a live cell

Melosira varians together with Mougeotia and Chlamydomonas. The scale bar indicates 50 µm. The specimen was gathered in the wetlands of Oderbruch (Oder valley 100 km north east of Berlin). 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).

Melosira (mell-o-sire-a) is a centric diatom. The cells are like old-style hat boxes, or old-style pill boxes, or like petri-dishes. In Melosira, many cells are joined end to end to create a filament. The less substantial rings on the lower image are where the two halves of the frustule are joined together by the girdle bands, the more visible connections are where two cells are joined together. Each cell has a radial symmetry. As with other diatoms, plastids have chlorophylls a and c and so have a yellow brown colour. Differential interference contrast.

Melosira (mellow-sire-a) nummuloides, filament forming centric diatom, with multiple small plastids within the cell clearly shown in this micrograph. Differential interference microscopy. data on this strain.