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| Gomphonema subtile var. sagitta (sagittum) (Schumann) Grunow in Van Heurck 1880 |
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| Navicula cryptocephala var. lancettula (Schumann) Grunow in Van Heurck 1880 |
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| Navicula peregrina var. menisculus (Schumann) Grunow in Van Heurck 1880 |
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| Navicula peregrina var. meniscus (Schumann) Grunow in Van Heurck 1880 |
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| Navicula gracilis var. neglecta (Thwaites) Grunow in Van Heurck 1880 |
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| Schizonema thwaitesii (W. Smith ex Grunow in Van Heurck) Grunow in Van Heurck 1880 |
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| Encyonema gracile var. lunatum (W. Smith) Van Heurck 1880 |
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| Encyonema lunatum (W. Smith) Van Heurck 1880 |
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| Gomphonema gracile var. naviculoides (W. Smith) Grunow in Van Heurck 1880 |
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| Amphitropis hyalina ‘Eulenstein manuscript’ Grunow in Van Heurck 1880 |
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| Schizonema antarcticum ‘Harvey manuscript’ Grunow in VanHeurck 1880 |
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| Amphora marina ‘W. Smith’ sensu Van Heurck 1880 |
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| Navicula claviculus Arnott ex Grunow in Van Heurck 1880 |
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| Gomphonema angustum Brebisson fide Grunow in Van Heurck 1880 |
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| Navicula leptocephala Brébisson in Hérb. Kützing ex Grunow in Van Heurck 1880 |
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| Cocconeis diaphana var. amygdalina Brebisson manuscript, Van Heurck 1880 |
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| Amphiprora hyalina Eulenstein ex Grunow in Van Heurck 1880 |
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| Cocconeis costata var. pacifica Grunow 1880 |
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| Cocconeis scutellum f. parva Grunow 1880 |
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| Cocconeis amygdalina f. minor Grunow in Van Heruck 1880 |
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