Genus: Cell body elongated spindle in shape, straight or curved, sharply pointed at both ends;
(Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species: Cell body elongate fusiform, tapering toward the sharply pointed ends, sigmoid,
undulate to helicoidally twisted (1 - 1.5 turns),
16-18 μm long between the ends, 1-2 μm wide;
two chloroplasts, parietal, entending into the ends, without pyrenoids;
cell division produces 2, 4 or 8 "autospores"
(Photomicrographs of the Freshwater Algae, 1996).
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