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| Eunotia robusta var. triodon (Ehrenberg; Ehrenberg) Ralfs in Pritchard 1861 |
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| Eunotia terra Ralfs in Pritchard 1861 |
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| Euodia brightwellii Ralfs in Pritchard 1861 |
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| Euodia gibba J.W. Bailey, Ralfs in Pritchard 1861 |
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| Eupodiscus grevillii Ralfs in Pritchard 1861 |
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| Eupodiscus peruvianus Kitton ex Ralfs in Pritchard 1861 |
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| Excentron cancroides Ralfs in litt., Ralfs in Pritchard 1861 |
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| Exilaria truncata Greville, Ralfs in Pritchard 1861 |
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| Exilaria truncata Greville, Ralfs in Pritchard 1861 |
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| Fragilaria amphilepta (Ehrenberg) Ralfs in Pritchard 1861 |
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| Fragilaria seminuda [Ehrenberg] in Ralfs in Pritchard 1861 |
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| Gaillonella undata Ehrenberg in Ralfs in Prichard 1861 |
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| Grammatophora subtilissima J.W. Bailey ex Ralfs in Pritchard 1861 |
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| Himantidium parallelum (Ehrenberg; Ehrenberg) Ralfs in Pritchard 1861 |
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| Himantidium praeruptum (Ehrenberg; Ehrenberg) Ralfs in Pritchard 1861 |
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| Hyalosira beswickii Norman ex Ralfs in Pritchard 1861 |
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| Melosira arctica (Ehrenberg) Ralfs in Pritchard 1861 |
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| Melosira californica (Ehrenberg) Ralfs in Pritchard 1861 |
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| Melosira campylosira (Ehrenberg) Ralfs in Pritchard 1861 |
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| Melosira circularis (Ehrenberg) Ralfs in Pritchard 1861 |
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