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| Cymbella turgidula var. brevis Grunow in Van Heurck 1882-1885 |
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| Denticula elegans var. ocellata (W. Smith) Grunow in Van Heurck 1882-1885 |
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| Diatoma vulgare var. distorta Grunow in Van Heurck 1882-1885 |
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| Encyonema ventricosum var. lunula Grunow in Van Heurck 1882-1885 |
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| Encyonema ventricosum f. perminuta Grunow in Van Heurck 1882-1885 |
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| Epithemia gibberula var. protracta Grunow in Van Heurck 1882-1885 |
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| Eunotia paludosa var. arculus Grunow in Van Heurck 1882-1885 |
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| Eupodiscus weissflogii Grunow in Van Heurck 1882-1885 |
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| Hantzschia hyalina Grunow in Van Heurck 1882-1885 |
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| Mastogloia braunii var. baldjikiana Grunow in Van Heurck 1882-1885 |
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| Micropodiscus weissflogii Grunow in Van Heurck 1882-1885 |
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| Navicula anglica var. subcruciata Grunow in Van Heurck 1882-1885 |
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| Navicula brebissonii var. bicuneata Grunow in Van Heurck 1882-1885 |
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| Navicula bulnheimii var. belgica Grunow in Van Heurck 1882-1885 |
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| Navicula cryptocephala var. intermedia Van Heurck 1882-1885 |
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| Navicula sudetica var. britannica Grunow in Van Heurck 1882-1885 |
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| Nitzschia linearis var. major Grunow in Van Heurck 1882-1885 |
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| Nitzschia linearis var. subsigmoidea Grunow in Van Heurck 1882-1885 |
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| Nitzschia normanii Van Heurck 1882-1885 |
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| Nitzschia subtilis var. mexicana Grunow in Van Heurck 1882-1885 |
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