Genus: Unicellular; planktonic; cell body flat, ovoidal; two flagella emerging from anterior end, one extends anteriorly and
another posteriorly; a reservoir and a contractile vacuole present, trichocysts absent;
many chloroplasts ellipsoidal in shape, light green in color
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species:
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