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Caloneis
Caloneis, like its sister genus Pinnularia, is defined by its chambered striae. These striae give it the appearance of having a second line across the striae, as shown on the right. The genus Caloneis is very similar to the genus Pinnularia; some researchers think they should be considered one genus.
C. amphisbaena
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Cells are 59-77 µm in length, 21-26.4 µm in width.
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Rows of striae are 15-17 per 10 µm.
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Cells are oval with small protruding round points.
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C. amphisbaena differs from other Calonies species by its diamond-shaped central area where the striae do not go.
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A3m1 Caloneis amphisbaena_edited
A1m1 Caloneis amphisbaena_edited
Chambered striae secondary lines shown by black arrows
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