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| Navicula tumida var. linearis O'Meara 1875 |
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| Navicula undosa sensu O'Meara 1875 |
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| Navicula undulata O'Meara 1875 |
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| Navicula vickersii O'Meara 1875 |
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| Navicula williamsonii O'Meara 1875 |
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| Odontidium elegans (Kützing) O'Meara 1875 |
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| Odontidium inflatum (W. Smith) O'Meara 1875 |
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| Odontidium sinuatum (Thwaites in W. Smith) O'Meara 1875 |
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| Odontidium teune (Kützing) O’Meara 1875 |
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| Odontodiscus anglicus (Donkin) O'Meara 1875 |
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| Odontodiscus hibernicus O'Meara 1875 |
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| Orthosira roeseana (Rabenhorst) O'Meara 1875 |
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| Orthosira sulcata (Ehrenberg) O'Meara 1875 |
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| Ralfsia hyalina (Kützing) O'Meara 1875 |
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| Ralfsia minima (Ralfs) O'Meara 1875 |
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| Ralfsia tabellaria O'Meara 1875 |
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| Rhaphoneis amphiceros var. leptoceros (Ehrenberg) O'Meara 1875 |
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| Rhaphoneis (Raphoneis) harrisonii (W. Smith) O'Meara 1875 |
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| Synedra acula var. tenuissima (Kützing) O’Meara 1875 |
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| Synedra capitata var. longiceps (Ehrenberg) O’Meara 1875 |
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