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Portrait of the planktonic chlorococcalean alga Golenkinia radiata (Chodat,1894) Korshikov,1953.Cells are solitary, spherical with multiple radiating fine spines at least 2-3 times cell width in length.There is a single cup-shaped chloroplast.Collected from a freshwater pond near Boise, Idaho. Phase contrast.
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In vivo portrait of the volvocid flagellate, Volvulina steinii Playfair,1915. Collected from a temporary rainwater puddle on a grass lawn in Boise, Idaho 43°36'49.03"" N 116° 13' 23.77"" W elev. 2674 ft.March 2006.Brightfield.
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Portartit of the volvocid flagellate, Volvulina steinii Playfair,1915. The cells are hemispherical with the flattened face of each toward the exterior in contact with the thin investing gelatinous envelope.The inner limit of the envelope is visible here. the thickness of the investing layer of the gelatinous envelope is indicated here by debris adhering to its exterior surface.Each of the 16 cells in the colony bears two equal-length flagella (seen here in the cell at 12 o'clock). Only cells at the ""anterior"" end of the colony have eyespots. each cell has two contractile vacuoles (seen here in the cell at 12 o'clock.Collected from a temporary rainwater puddle on a grass lawn in Boise, Idaho In vivo portrait of the volvocid flagellate, 43°36'49.03"" N 116° 13' 23.77"" W elev. 2674 ft. elev. 2674 ft. March 2006. DIC.
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In vivo portartit of slightly compressed volvocid flagellate, Volvulina steinii Playfair,1915 showing the two contractile vacuoles. The single nucleus of several cells is visible. Only the ""anterior"" cells of the colony have red eyespots. Collected from a temporary rainwater puddle on a grass lawn in Boise, Idaho. 43°36'49.03"" N 116° 13' 23.77"" W elev. 2674 ft. March 2006. DIC.
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In vivo surface view of the volvocid flagellate, Volvulina steinii Playfair,1915. Collected from a temporary rainwater puddle on a grass lawn in Boise, Idaho 43° 36' 49.03"" N 116° 13' 23.77"" W elev. 2674 ft. March 2006. DIC.
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Close-up view of Asterococcus limneticus. In the center of the cell we see a pyrenoid amidst the stellate chloroplast. In addition, the right cell shows the nucleus (1) and the two contractile vacuoles (2). Sample from sphagnum pond Dosenmoor near Neumuenster (Schleswig-Holstein, Germany). Images were taken using Zeiss Axioplan with Canon 600D CCD camera. Image under Creative Commons License V 3.0 (CC BY-NC-SA).