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Very small rectangular diatoms connected ...
Star like diatom. Phytoplankton. 40x amp on ...
Small colonial diatoms; nearly square
Shallow pond in rural SW Pennsylvania
Found along shoreline of small man-made lake.
Found along shoreline of small man-made lake
Vernal pond in rural SW Pennsylvania
Roadside ditch in rural SW Pennsylvania
Shallow pond, recently thawed; rural SW Pennsylvania
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