| WebNameShort | |
| Cocconeis scutellum var. beta W. Smith 1853 |
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| Cocconeis thwaitesii W. Smith 1853 |
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| Cocconema parvum W. Smith 1853 |
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| Coscinodiscus minor W. Smith 1853 |
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| Cyclotella antiqua W. Smith 1853 |
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| Cyclotella kuetzingiana W. Smith 1853 |
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| Cymatopleura apiculata W. Smith 1853 |
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| Cymatopleura elliptica W. Smith 1853 |
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| Cymatopleura parallela W. Smith 1853 |
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| Cymatopleura solea W. Smith 1853 |
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| Cymbella cuspidata W. Smith 1853 |
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| Cymbella helvetica W. Smith 1853 |
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| Cymbella maculata W. Smith 1853 |
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| Cymbella scotica W. Smith 1853 |
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| Epithemia alpestris W. Smith 1853 |
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| Epithemia argus W. Smith 1853 |
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| Epithemia constricta W. Smith 1853 |
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| Epithemia granulata W. Smith 1853 |
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| Epithemia ocellata W. Smith 1853 |
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| Epithemia proboscidea W. Smith 1853 |
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