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| Meridion constrictum (constricta) var. gamma W. Smith 1856 |
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| Navicula amphisbaena var. gamma W. Smith 1856 |
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| Navicula biscalaris Brebisson in litt., Janisch ex W. Smith 1856 |
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| Navicula elliptica var. beta W. Smith 1856 |
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| Navicula firma var. gamma W. Smith 1856 |
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| Navicula hennedyi W. Smith 1856 |
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| Navicula hennedyii W. Smith 1856 |
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| Navicula humerosa Brébisson ex W. Smith 1856 |
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| Navicula laevissima sensu W. Smith 1856 |
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| Navicula ovalis var. beta W. Smith 1856 |
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| Navicula pectinalis Brébisson in litt., W. Smith 1856 |
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| Navicula rhomboides var. beta W. Smith 1856 |
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| Navicula rostellum W. Smith 1856 |
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| Navicula scutelloides W. Smith 1856 |
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| Navicula smithii Brébisson in W. Smith 1856 |
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| Navicula trinodis W. Smith 1856 |
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| Nitzschia curvula W. Smith 1856 |
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| Nitzschia linearis var. beta W. Smith 1856 |
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| Nitzschia palea (Kützing) W. Smith 1856 |
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| Odontidium anomalum W. Smith 1856 |
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