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| Micromega parasiticum (Griffiths in Harvey) Ralfs in Pritchard 1861 |
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| Micromega parvum (Meneghini in Kutzing) Ralfs in Pritchard 1861 |
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| Micromega plumosum (Kützing) Ralfs in Pritchard 1861 |
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| Micromega smithii (C. Agardh) Ralfs in Pritchard 1861 |
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| Micromega torquatum (Harvey) Ralfs in Pritchard 1861 |
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| Micromega trichocephalum (Kützing) Ralfs in Pritchard 1861 |
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| Micromega wyattii (Harvey) Ralfs in Pritchard 1861 |
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| Micromega zanardinii (Meneghini) Ralfs in Pritchard 1861 |
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| Navicula acuminata (W. Smith) Ralfs in Pritchard 1861 |
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| Navicula acutiuscula (Gregory) Ralfs in Pritchard 1861 |
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| Navicula allmaniana (Gregory) Ralfs in Pritchard 1861 |
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| Navicula anglica Ralfs in Pritchard 1861 |
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| Navicula birostris (Ehrenberg) Ralfs in Pritchard 1861 |
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| Navicula bullata Norman in Ralfs in Pritchard 1861 |
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| Navicula cincta (Ehrenberg) Ralfs in Pritchard 1861 |
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| Navicula cocconeoides (Rabenhorst) Ralfs in Pritchard 1861 |
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| Navicula couperi (Bailey) Ralfs in Pritchard 1861 |
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| Navicula digitoradiata (Gregory) Ralfs in Pritchard 1861 |
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| Navicula digitus (Ehrenberg) Ralfs in Pritchard 1861 |
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| Navicula diomphala (Ehrenberg) Ralfs 1861 |
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