Chlorellales

Micractinium pusillum (Fresenius,1858). Usually found in four-celled colonies (only three of the four cells of this colony are seen here). Each cell has two to seven long, delicate setae. Each cell has one cup-shaped plastid with a pyrenoid. 18S ribosomal RNA gene studies place this genus in the Trebouxiophyceae. One of the distinguishing features of trebouxiophytes is metacentric mitosis in which centrioles are located near the metaphase plate of the chromosomes rather than at the spindle poles. Other characteristics include formation of microtubules parallel to the dividing cell wall during cytokinesis (phycoplast). The similar genus, Errerella, has only one spine per cell.Collected from a freshwater pond near Boise, Idaho. July 2005. Phase contrast.

Green algae live in a mucus ball. Phase contrast microscopy.

Portrait of the planktonic green alga Chodatella longiseta (Lemmerman,1898;Printz). This genus differs from the very similar Franceia in having long slender spinous processes limited to the poles of the ovoid cell. There is no gelatinous layer. There are two chloroplasts each with a prominent pyrenoid (seen in this image). Collected from a freshwater pond near Boise, Idaho June 2004. DIC optics.

Chodatella citriformis containing 8 autospores, sampled from shore water of Lake Kinneret in March 2006. This Chlorophyte (Chlorococcales) can be found in the plankton of the lake at most times of the year, particularly in May-June, but is never dominant.

Image courtesy of Winfreid Hölz, Hausen (Germany). Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Ponds near Hausen (Hessisch Lichtenau , Germany) Latitude: 51,21453 Longitude: 9,868894 Bild von Winfried Hölz, Hausen. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Scale bar indicates 25 µm. Sample from Bog Waasenmoos Pass Thurn near Mittersil, Tyrol, Austria. Sampling date 10/2019. 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: Bog Waasenmoos Pass Thurn near Mittersil (Tyrol, Austria) Latitude: 47,30234117 Longitude: 12,41751194 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 25 µm. Probe aus dem Waasenmoos bei Pass Thurn Nähe Mittersil, Tirol. Datum der Aufsammlung: 10/2019. 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.

The specimen was gathered in the pond Birkensee near Rödelsee (Lower Franconia, Germany). Sampling date 7/2018.Copyright Dr. Rainer Meisch, Würzburg, Germany.Images were taken using Zeiss Axioplan with Canon DSLR Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Pond Birkensee near Rödelsee (Lower Franconia, Germany) Latitude: 49,71819841 Longitude: 10,27807474 Probe aus dem Birkensee bei Rödelsee (Unterfranken). Datum der Aufsammlung: 7/2018. Copyright Dr. Rainer Meisch, Würzburg. Mikrotechnik: Zeiss Axioplan, Kamera: Canon DSLR. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Argusino, Castilla y Len, Espaa

Lardero, La Rioja, Spain

Scale bar indicates 25 m.Sample from the city park of Stockerau, Lower Austria. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Standard with Olympus OM-D M5 MK2 camera.For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Encinedo, Castilla y Len, Espaa

San Martin De Castaneda, Castille and Leon, Spain

Lardero, La Rioja, Spain

This green balls are often seen in sphagnum ponds. Looking through the stereomicroscope this group of specimen looked photogenic. The picture was generated from 5 shots using MicroPicS by Bernhard Wiedemann and Photoshop (depth of focus). Sample from sphagnum pond Dosenmoor near Neumuenster (Schleswig-Holstein, Germany). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Caada del Hoyo, Castilla-La Mancha, Espaa

Melgar de Tera, Castille and Leon, Spain

Ribadelago de Franco, Castilla y Len, Espaa

Portrait of the planktonic trebouxiophyte alga, Tetrastrum staurogeniaeforme (Schröder) Lemmermann.The colonies consist of four ellipsoid cells with four to six short spinous projections from the each cell surface. several four-celled colonies may join together to form compound colonie (compound coenobia). Each cell has one plastid and one pyrenoid.Collected from a freshwater pond near Boise,Idaho. July 2005.DIC.

These green balls are often seen in sphagnum ponds. Looking through the stereomicroscope this group of specimen looked photogenic. The picture was generated from 5 shots using MicroPicS by Bernhard Wiedemann and Photoshop (depth of focus). Sample from sphagnum pond Dosenmoor near Neumuenster (Schleswig-Holstein, Germany). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.

Scale bar indicates 25 µm.Sample from the city park of Stockerau, Lower Austria. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Standard with Olympus OM-D M5 MK2 camera.Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Pond in the city park of Stockerau (Lower Austria , Austria) Latitude: 48,385405 Longitude: 16,216845 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 25 µm. Probe aus dem Stadtpark Stockerau, Niederösterreich. Mikrotechnik: Zeiss Standard, Kamera: Olympus OM-D M5 MK2. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Eremosphaera viridis bears lots of chloroplasts, each with a central pyrenoid body. The brace like marks amidst the chloroplasts represent the amylum shells of the pyrenoids. High resolution picture assembled of 15 shots (manually stacked). Sample from sphagnum pond Dosenmoor near Neumuenster (Schleswig-Holstein, Germany). This image was 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 Eremosphaera viridis hat zahlreiche kleine Chloroplasten, jeweils mit einem zentralen Pyrenoid-Körper. Jeder Pyrenoid-Körper ist mit einer Stärkeschale umhüllt, man spricht auch von beschalten Pyrenoiden. Tiefenschärfe durch Multiebenenabbildung aus 15 Bildebenen, manuell gestapelt. Sample from sphagnum pond Dosenmoor near Neumuenster (Schleswig-Holstein, Germany). This image was taken using Zeiss Universal with Olympus C7070 CCD camera.Image under Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Franceia belongs to the Chlorococcales group of the Chlorophyta wearing arcuate spiny projections. Sample from littoral region (reed belt by Phragmites) of a rain storage reservoir in Kiel (Schleswig-Holstein, Germany). This image was 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 Franceia gehört zur Gruppe der Chlorococcales trägt bogenförmige, stachelige Schwebefortsätze. 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.

Argusino, Castilla y Len, Espaa

Galende, Castile and Len, Spain