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Mag. 100x and 400x
Large, sigmoid diatom found in brackish water. Characteristic "X" pattern of striae was seen in empty or partially empty cells at 400x (see photos 4, 5 and 7).
A shoreline water sample was taken on 8/21/2021 from a cove off the Thames River estuary (New London county, CT - brackish) using a 10 micron dip net to enrich for microorganisms.