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| Navicula gastrum var. placentula (Ehrenberg) Van Heurck 1885 |
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| Navicula iridis var. amphirynchus (Ehrenberg) Van Heurck 1885 |
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| Navicula iridis var. dubia (Ehrenberg) Van Heurck 1885 |
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| Navicula nobilis var. dactylus (Ehrenberg) Van Heurck 1885 |
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| Navicula stauroptera var. parva (Ehrenberg) Van Heurck 1885 |
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| Nitzschia longissima var. closterium (Ehrenberg) Van Heurck 1885 |
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| Rhaphoneis (Raphoneis) caduceus (caducea) (Ehrenberg; Ehrenberg) Van Heurck 1885 |
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| Surirella robusta var. splendida (Ehrenberg; Ehrenberg) Van Heurck 1885 |
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| Amphiprora lepidoptera var. pusilla (Gregory) Van Heurck 1885 |
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| Amphora angularis var. lyrata (Gregory) Van Heurck 1885 |
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| Coscinodiscus rothii var. normani (normanii) (Gregory) Van Heurck 1885 |
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| Coscinodiscus subtilis var. normannii (-manii, -manni) (Gregory) Van Heurck 1885 |
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| Dimeregramma (Dimerogramma) minor (minus) var. nana (Gregory) Van Heurck 1885 |
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| Navicula hennedyi (hennedii) var. clavata (Gregory) 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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| Surirella robusta var. tenera (Gregory) Van Heurck 1885 |
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| Nitzschia tryblionella var. calida (Grunow in Cleve & Grunow) Van Heurck 1885 |
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| Pleurosigma acuminatum var. brebissonii (Grunow in Cleve & Grunow) Van Heurck 1885 |
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| Pleurosigma balticum var. brebissonii (Grunow in Cleve & Grunow) Van Heurck 1885 |
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