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| Coscinodiscus superbus var. moravica (Grunow) Rattray 1890 |
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| Coscinodiscus superbus var. novazealandica Grove ex Rattray 1890 |
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| Coscinodiscus superbus var. nova-zealandica Grove manuscript in Rattray 1890 |
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| Coscinodiscus superbus var. novo-zealandicus (‘nova-zealandica’) Grove ex Rattray 1890 |
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| Coscinodiscus tenuis (Grunow in Van Heurck) Rattray 1890 |
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| Coscinodiscus tenuisculptus Rattray 1890 |
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| Coscinodiscus theskelos Rattray 1890 |
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| Coscinodiscus traducens Rattray 1890 |
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| Coscinodiscus traducens var. hispida Rattray 1890 |
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| Coscinodiscus trinitatis (Grunow in Van Heurck) Rattray 1890 |
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| Coscinodiscus tumidus var. fasciculata Rattray 1890 |
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| Coscinodiscus turgidus Rattray 1890 |
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| Coscinodiscus undulans Rattray 1890 |
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| Coscinodiscus vacuus Rattray 1890 |
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| Coscinodiscus vetustissimus var. curvatuloides Grove manuscript in Rattray 1890 |
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| Coscinodiscus whampoensis Grove manuscript in Rattray 1890 |
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| Coscinodiscus zebuensis Grunow manuscript, Rattray 1890 |
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| Coscinodiscus zonulatus Rattray 1890 |
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| Cosmiodiscus obliquus Greville manuscript, Rattray 1890 |
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| Cyclotella castracanei Eulenstein ms in Rattray 1890 |
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