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Navicula mutica form intermedia
Form, Diatom
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Navicula protracta form subcapitata
Form, Diatom
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Navicula smithii f. smithii
Form, Diatom, Marine
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Navicula soehrensis form capitata
Form, Diatom
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Neidium affine form undulatum
Form, Diatom
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Neidium dubium form constrictum
Form, Diatom
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Nitzschia amphibia form abbreviata
Form, Diatom
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Nitzschia amphibia form frauenfeldii
Form, Diatom
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Nitzschia amphibia form rostrata
Form, Diatom
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Pinnularia cleveana form stauroneiformis
Form, Diatom
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Pinnularia interrupta form minor
Form, Diatom
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Pinnularia microstauron form biundulata
Form, Diatom
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Placoneis placentula form rostrata
Form, Diatom
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Pleurosira laevis form polymorpha
Form, Diatom
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Psammothidium abundans form rosenstockii
Form, Diatom
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Psammothidium grishunum form daonensis
Form, Diatom
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Reimeria sinuata form antiqua
Form, Diatom
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Reimeria sinuata form ovata
Form, Diatom
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Rhizosolenia alata form alata
Form, Diatom
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Rhizosolenia alata form curvirostris
Form, Diatom