| WebNameShort | |
| Coscinodiscus dubius Rattray 1890 |
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| Coscinodiscus duriusculus Rattray 1890 |
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| Coscinodiscus echinatus Rattray 1890 |
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| Coscinodiscus egregius Rattray 1890 |
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| Coscinodiscus epiphanes Rattray 1890 |
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| Coscinodiscus evadens Rattray 1890 |
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| Coscinodiscus evadens var. parvula Rattray 1890 |
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| Coscinodiscus exasperans Rattray 1890 |
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| Coscinodiscus excavatus var. deliquescens Rattray 1890 |
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| Coscinodiscus excentricus var. hyalina Rattray 1890 |
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| Coscinodiscus excentricus var. micropora Grunow in Rattray 1890 |
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| Coscinodiscus excentricus var. zebuensis Rattray 1890 |
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| Coscinodiscus exiguus Rattray 1890 |
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| Coscinodiscus exiguus var. aequalis Rattray 1890 |
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| Coscinodiscus exutus Rattray 1890 |
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| Coscinodiscus fimbriatus var. subradiata Rattray 1890 |
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| Coscinodiscus flagrans Rattray 1890 |
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| Coscinodiscus flexilis Rattray 1890 |
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| Coscinodiscus florescens Grunow in Rattray 1890 |
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| Coscinodiscus foraminosus Greville manuscript in Coll. British Museum ex Rattray 1890 |
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