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Differential interference contrast image of a cluster of cells attached to the coversl;ip by their flagella.
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Polytomella (paul-ee-toe-mell-a) is one of a small number of green (Viridaeplantae) algal genera which lack plastids. There are four flagella inserting in a square pattern - and only two opposed flagella can be seen in this image. The flagella insert in small dimples at the anterior end of the cell. Often found in habitats rich in organic matter and low in oxygen. Phase contrast.
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This flagellated protozoa was observed from a perchlorate treating laboratory scale anaerobic bioreactor (ORP~ -200 mV) fed with acetate as substrate. It was characterized by a pair of anterior flagella, tailing body and intracellular starch granules. Krishnakumar B and Anupama V.N. of NIIST (CSIR) are involved in the bioreactor study. The phase contrast image shows cells with intracellular starch granules and the same released to the medium.
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Portrait of Vitreochlamys fluviatilis, formerly Sphaerellopsis fluviatilis. The genus name, Sphaerellopsis (Korchikoff, 1925) was preoccupied by an Ascomycete fungus. This fungus Sphaerellopsis filum (Cooke, 1883) is a hyperparasite of another fungus, willow rust (Melampsora). Batko renamed this volvocid flagellate genus Vitreochlamys. This genus is similar to Chlamydomonas (some consider it synonymous) but differs from it by having a protoplast and surrounding gelatinous sheath that are fusiform. There are two equal length flagella. The nucleus is central. There is a large cup-shaped chloroplast and a posterior pyrenoid. Two anterior contractile vacuoles are located near the flagellar bases. There is a small anterior stigma. From a freshwater pond near Boise, Idaho. Oblique illumination.
