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| Surirella nervosa (A. Schmidt) Hustedt 1957 |
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| Stauroneis borrichii f. subcapitata (Boye Petersen) Hustedt 1957 |
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| Caloneis amphisbaena f. subsalina (Donkin) Hustedt 1957 |
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| Cocconeis placentula f. euglypta (Ehrenberg) Hustedt 1957 |
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| Cocconeis placentula f. lineata (Ehrenberg) Hustedt 1957 |
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| Cymatopleura solea f. regula (Ehrenberg) Hustedt 1957 |
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| Epithemia turgida f. granulata (Ehrenberg) Hustedt 1957 |
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| Fragilaria construens f. binodis (Ehrenberg) Hustedt 1957 |
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| Fragilaria construens f. venter (Ehrenberg) Hustedt 1957 |
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| Gomphonema constrictum f. capitata (Ehrenberg) Hustedt 1957 |
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| Navicula hungarica f. capitata (Ehrenberg) Hustedt 1957 |
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| Navicula mutica f. nivalis (Ehrenberg) Hustedt 1957 |
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| Rhopalodia gibba f. ventricosa (Ehrenberg) Hustedt 1957 |
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| Eunotia pectinalis f. ventralis (Ehrenberg; Ehrenberg) Hustedt 1957 |
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| Neidium affine (affinis) f. constricta (Frenguelli) Hustedt 1957 |
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| Actinocyclus normanii (Gregory ex Greville) Hustedt 1957 |
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| Gomphonema angustatum f. sarcophagus (Gregory) Hustedt 1957 |
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| Nitzschia hungarica f. linearis (Grunow in Cleve & Grunow) Hustedt 1957 |
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| Nitzschia punctata f. coarctata (Grunow in Cleve & Moller; Grunow in Cleve & Grunow) Hustedt 1957 |
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| Diatoma vulgare f. linearis (Grunow in Van Heurck) Hustedt 1957 |
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