Chlorellaceae

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.

Argusino, Castilla y Len, Espaa

Encinedo, Castilla y Len, Espaa

San Martin De Castaneda, Castille and Leon, Spain

Ribadelago de Franco, Castilla y Len, Espaa

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.

Dictyosphaerium spec. in mucilaginous envelope. Scale bar indicates 25 µm. The specimen was gathered in the wetlands of Nationalpark Unteres Odertal ( 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). Place name: Creek in Oder valley 100 km north east of Berlin (Germany) Latitude: 53,135032 Longitude: 14,348738 Dictyosphaerium spec. in schleimiger Hülle. Der Messbalken markiert eine Länge von 25 µm. Die Probe wurde in den Feuchtgebieten des Nationalpark Unteres Odertal (100 km nordöstlich von Berlin) gesammelt. 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.

Dictyosphaerium spec. in mucilaginous envelope. Scale bar indicates 25 µm. The specimen was gathered in 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. 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 Dictyosphaerium spec. in schleimiger Hülle. Der Messbalken markiert eine Länge von 25 µm. Die Probe wurde im Stadtpark Stockerau, Niederösterreich, gesammelt. 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.

Argusino, Castilla y Len, Espaa

Galende, Castile and Len, Spain

Endosymbiotic Chlorella spec. in a ciliate. Scale bar indicates 10 µm. Sample from Kaltenhof Bog in the north of Kiel, Germany. Sampling date 9/2018. 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: Bog Kaltenhof near Kiel (Schleswig-Holstein, Germany) Latitude: 54,42102744 Longitude: 10,07686615 Endosymbiotische Chlorella spec. in einem Ciliaten. Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 10 µm. Probe aus dem Kaltenhofer Moor nördlich von Kiel. Datum der Aufsammlung: 9/2018. 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.

The specimen was gathered in ponds near Hausen (Hessisch Lichtenau , Germany). Copyright Winfried Hölz, Hausen, Germany.Images were taken using Zeiss Axioskop with DSLR.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 Probe aus Gewässern nahe Hausen (Hessisch Lichtenau).Copyright Winfried Hölz, Hausen. Mikrotechnik: Zeiss Axioskop, Kamera: DSLR. 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 50 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 50 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.

Ribadelago de Franco, Castille and Leon, Spain

Scale bar indicates 25 µm. The specimen was gathered in a pond in the forest of Altenholz-Stift near Kiel. Sampling date 6/2017. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Axioskop with Olympus OM-D M5 MKII. Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Pond in the forest of Altenholz-Stift (Schleswig-Holstein, Germany) Latitude: 54,384913 Longitude: 10,125691 Der Messbalken markiert eine Länge von 25 µm. Die Probe wurde in einem Waldteich bei Altenholz-Stift (nahe Kiel) gesammelt. Datum der Aufsammlung: 6/2017. 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.

Ribadelago de Franco, Castille and Leon, Spain

Scale bar indicates 50 µm. The specimen was gathered in a pond in the forest of Altenholz-Stift near Kiel. Sampling date 6/2017. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Axioskop with Olympus OM-D M5 MKII. Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Pond in the forest of Altenholz-Stift (Schleswig-Holstein, Germany) Latitude: 54,384913 Longitude: 10,125691 Der Messbalken markiert eine Länge von 50 µm. Die Probe wurde in einem Waldteich bei Altenholz-Stift (nahe Kiel) gesammelt. Datum der Aufsammlung: 6/2017. 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.

Galende, Castile and Len, Spain

Scale bar indicates 50 µm. The specimen was gathered in the wetlands of Nationalpark Unteres Odertal ( 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). 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 50 µm. Die Probe wurde in den Feuchtgebieten des Nationalpark Unteres Odertal (100 km nordöstlich von Berlin) gesammelt. 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.

Scale bar indicates 10 µm. The specimen was gathered in a pond in the forest of Altenholz-Stift near Kiel. Sampling date 6/2017. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Axioskop with Olympus OM-D M5 MKII. Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Pond in the forest of Altenholz-Stift (Schleswig-Holstein, Germany) Latitude: 54,384913 Longitude: 10,125691 Der Messbalken markiert eine Länge von 10 µm. Die Probe wurde in einem Waldteich bei Altenholz-Stift (nahe Kiel) gesammelt. Datum der Aufsammlung: 6/2017. 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.

Scale bar indicates 25 µm. The specimen was gathered in a pond in the forest of Altenholz-Stift near Kiel. Sampling date 6/2017. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Axioskop with Olympus OM-D M5 MKII. Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Pond in the forest of Altenholz-Stift (Schleswig-Holstein, Germany) Latitude: 54,384913 Longitude: 10,125691 Der Messbalken markiert eine Länge von 25 µm. Die Probe wurde in einem Waldteich bei Altenholz-Stift (nahe Kiel) gesammelt. Datum der Aufsammlung: 6/2017. 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.

This 1971 image depicted a frontal view of a Petri dish culture in which a small colony of Prototheca wickerhamii algal organisms had been cultivated.Created: 1971

At a magnification of 1125X, this photomicrograph revealed the presence of a number of Prototheca wickerhamii algal organisms.Created: 1971

Under a magnification of 1125X, this photomicrograph revealed the presence of numbers of algal organisms, Prototheca wickerhamii, which were found within a tissue specimen. Though categorized taxonomically as an alga, it derives its sustenance as a saprophyte, consuming dead and decaying organic matter. This algal culture was prepared using a lactophenol cotton blue mount fixation technique.Under microscopic analysis, Prototheca spp. resemble a fungal organism, and can therefore, be mistaken when attempting to identify these algae.Similar to the members of the genus Chlorella, Prototheca spp. are heterotrophic, , which means these organisms require carbon in order to thrive, and obtains this nutrient through its consumption of organic substrates. This algal culture was prepared using a lactophenol cotton blue mount fixation technique.Created: 1972