 21343bw Fresh water pennate diatom frustule
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 21345bw Fresh water pennate diatom frustule
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 21353bw Fresh water pennate diatom frustule
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 23316A Centric fossil diatom frustule
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 23316B Centric fossil diatom frustule
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 23316C Centric fossil diatom frustule
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 23324A Centric fossil diatom frustule (Actinoptychus heliopelta)
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 23324B Centric fossil diatom frustule (Actinoptychus heliopelta)
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 23324C Centric fossil diatom frustule (Actinoptychus heliopelta)
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 23482A Marine centric diatom frustule (Biddulphia aurita)
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 23482B Marine centric diatom frustule (Biddulphia aurita)
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 23482C Marine centric diatom frustule (Biddulphia aurita)
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