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| Aulacoseira lirata var. perglabra (Østrup) R. Ross in Hartley 1986 |
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| Neidium glaberrimum (Østrup) R. Ross in Hartley 1986 |
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| Gomphonema vibrio var. fossile (Pantocesk) R. Ross in Hartley 1986 |
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| Navicula retusa var. gregorii (Ralfs in Pritchard) R. Ross in Hartley 1986 |
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| Gomphonema vibrio var. bohemicum (Reichelt et Fricke in A. Schmidt) R. Ross in Hartley 1986 |
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| Odontella granulata (Roper) R. Ross in Hartley 1986 |
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| Achnanthes lanceolata var. elliptico-lanceolata (Schaarschmidt) R. Ross in Hartley 1986 |
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| Berkeleya scopulorum var. belgica (Van Heurck) R. Ross in Hartley 1986 |
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| Achnanthes expressa J. R. Carter in Hartley 1986 |
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| Achnanthes sonyda J.R. Carter in Hartley 1986 |
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| Brachysira brebissonii R. Ross in Hartley 1986 |
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| Navicula derasa var. transitans R. Ross in Hartley 1986 |
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| Nitzschia incurva var. lorenziana R. Ross in Hartley 1986 |
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| Cerataulus radiatus R. Ross in Hartley, Ross & Williams 1986 |
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