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| Caloneis amphisbaena var. fossilis Okuno 1952 |
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| Caloneis permagna var. fossilis Okuno 1952 |
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| Diploneis formica Okuno 1952 |
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| Eunotia flexuosa var. linearis Okuno 1952 |
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| Eunotia formica var. minor Okuno 1952 |
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| Fragilaria virescens var. undulata Okuno 1952 |
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| Gomphonema parvulum var. clavatum Okuno 1952 |
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| Navicula ariiensis Okuno 1952 |
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| Navicula onoensis Okuno 1952 |
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| Opephora martyi var. okadae (Skvortzow) Okuno 1952 |
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| Pinnularia kotoriensis Okuno 1952 |
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| Pinnularia makariensis Okuno 1952 |
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| Stephanodiscus niagarae var. intermedia (Fricke in Schmidt et al.) Okuno 1952 |
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| Stephanodiscus niagarae var. intermedia (Fricke) Okuno 1952 |
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| Stephanodiscus niagarae var. minutula (Grunow) Okuno 1952 |
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| Stephanodiscus niagarae var. minutula (Kützing) Okuno 1952 |
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| Surirella tenella var. palmeri (Boyer) Okuno 1952 |
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