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| Achnanthes exilis sensu W. Smith 1856 |
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| Achnanthes longipes var. ‘beta’ W. Smith 1856 |
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| Achnanthes longipes var. ‘gamma’ W. Smith 1856 |
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| Achnanthidium microcephalum sensu W. Smith 1856 |
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| Actinocyclus duodenarius (Ehrenberg) W. Smith 1856 |
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| Amphiprora elegans W. Smith 1856 |
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| Asterionella bleakeleyi W. Smith 1856 |
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| Asterionella ralfsii W. Smith 1856 |
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| Berkeleya fragilis sensu W. Smith 1856 |
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| Biddulphia baileyii W. Smith 1856 |
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| Biddulphia regina W. Smith 1856 |
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| Colletonema eximium Thwaites ex W. Smith 1856 |
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| Colletonema neglectum (Thwaites) W. Smith 1856 |
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| Colletonema subcohaerens (subcoherens) (Thwaites) W. Smith 1856 |
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| Colletonema vulgare (Thwaites) W. Smith 1856 |
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| Coscinodiscus concinnus W. Smith 1856 |
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| Cyclotella dallasiana W. Smith 1856 |
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| Cyclotella punctata W. Smith 1856 |
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| Cymbella helvetica var. beta W. Smith 1856 |
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| Cymbella scotica var. beta Smith 1856 |
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