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| Navicula nobilis var. dactylus (Ehrenberg) Van Heurck 1885 |
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| Navicula palpebralis var. angulosa (Gregory) Van Heurck 1885 |
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| Navicula palpebralis var. barclayana (Gregory) Van Heurck 1885 |
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| Navicula palpebralis var. barclayana sensu Van Heurck 1885 |
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| Navicula palpebralis var. obtusa Van Heurck 1885 |
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| Navicula peregrina f. upsaliensis (Grunow in Van Heurck) Van Heurck 1885 |
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| Navicula radiosa var. tenella (Brébisson ex Kützing) Van Heurck 1885 |
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| Navicula reinhardti (reinhardtii) var. gracilior Grunow in Van Heurck 1885 |
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| Navicula retusa sensu Van Heurck 1885 |
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| Navicula stauroptera var. parva (Ehrenberg) 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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| Navicula viridula var. avenacea (Brébisson) Van Heurck 1885 |
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| Navicula viridula var. slesvicensis (Grunow) Van Heurck 1885 |
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| Nitzschia delognei Grunow in Van Heurck 1885 |
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| Nitzschia frustulum var. perpusilla (Rabenhorst) Van Heurck 1885 |
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| Nitzschia longissima var. closterium (Ehrenberg) Van Heurck 1885 |
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| Nitzschia microcephala var. elegantula (Grunow in Van Heurck) Van Heurck 1885 |
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| Nitzschia obtusa var. brevissima Van Heurck 1885 |
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| Nitzschia obtusa var. nana Grunow in Van Heurck 1885 |
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