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R. setigera bloom: var setigera + var. pungens; diameters 6-9µm
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4648a
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TEM of cleaned P. calliantha frustules. Note the long, thin valves and the central nodule.
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Valve view of P. calliantha, note the diagnostic flower pattern in the poroid hymen
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Fjellerup Strand
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Fjellerup Strand
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