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| Nitzschia tergestina (Kützing) Ralfs in Pritchard 1861 |
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| Nitzschia valens (Ehrenberg) Ralfs in Pritchard 1861 |
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| Nitzschia vermicularis (Kützing) Ralfs in Pritchard 1861 |
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| Odontidium anceps (Ehrenberg) Ralfs in Pritchard 1861 |
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| Odontidium cretae (Ehrenberg) Ralfs in Pritchard 1861 |
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| Orthosira americana (Kützing) Ralfs in Pritchard 1861 |
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| Pinnularia ambigua Ehrenberg in Ralfs in Pritchard 1861 |
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| Pinnularia phenana Ehrenberg in Ralfs in Pritchard 1861 |
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| Plagiogramma grevillii Ralfs in Pritchard 1861 |
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| Plagiogramma himantidium (Ehrenberg) Ralfs in Pritchard 1861 |
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| Plagiogramma interruptum (Gregory) Ralfs in Pritchard 1861 |
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| Plagiogramma laevis (leve) (Gregory) Ralfs in Pritchard 1861 |
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| Pleurosigma acutum Norman ex Ralfs in Pritchard 1861 |
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| Pleurosigma apulum (Rabenhorst) Ralfs in Pritchard 1861 |
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| Pleurosigma curvulum (Ehrenberg) Ralfs in Pritchard 1861 |
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| Pleurosigma cuspidatum (Rabenhorst) Ralfs in Pritchard 1861 |
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| Pleurosigma lamprocampum (Ehrenberg) Ralfs in Pritchard 1861 |
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| Pleurosigma normanii Ralfs in Pritchard 1861 |
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| Pleurosigma scalpellum (Kützing) Ralfs in Pritchard 1861 |
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| Pleurosigma scalprum (Gaillon in Turpin) Ralfs in Pritchard 1861 |
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