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| Synedra ulna var. obtusa (W. Smith) Van Heurck 1885 |
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| Amphora angularis var. hybrida Grunow in Van Heurck 1885 |
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| Amphora ostrearia subvar. belgica Grunow in Van Heurck 1885 |
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| Cyclotella operculata var. radiosa Grunow in Van Heurck 1885 |
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| Cymbella microcephala Grunow in Van Heurck 1885 |
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| Fragilaria brevistriata Grunow in Van Heurck 1885 |
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| Melosira juergensii (juergensi) var. octagona Grunow in Van Heurck 1885 |
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| Navicula contenta Grunow in Van Heurck 1885 |
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| Navicula cuspidata var. halophila Grunow in Van Heurck 1885 |
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| Navicula fontinalis Grunow in Van Heurck 1885 |
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| Navicula liburnica Grunow in Van Heurck 1885 |
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| Navicula reinhardti (reinhardtii) var. gracilior Grunow in Van Heurck 1885 |
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| Navicula sublinearis Grunow in Van Heurck 1885 |
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| Navicula subretusa Grunow in Van Heurck 1885 |
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| Nitzschia delognei Grunow in Van Heurck 1885 |
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| Nitzschia obtusa var. nana Grunow in Van Heurck 1885 |
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| Pleurosigma affine var. nicobarica Grunow in Van Heurck 1885 |
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| Stauroneis africana var. acuminata Grunow in Van Heurck 1885 |
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| Surirella striatula var. biplicata Grunow in Van Heurck 1885 |
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| Vanheurckia rhomboides f. crassinervia Grunow in Van Heurck 1885 |
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