| WebNameShort | |
| Coscinodiscus flexilis Rattray 1890 |
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| Coscinodiscus gigas var. laxa Rattray 1890 |
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| Coscinodiscus gigas var. punctiformis Rattray 1890 |
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| Coscinodiscus glaberrimus Rattray 1890 |
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| Coscinodiscus gracilentus Rattray 1890 |
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| Coscinodiscus grandineus Rattray 1890 |
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| Coscinodiscus grandineus var. dentata Rattray 1890 |
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| Coscinodiscus granulosus var. conspicua Rattray 1890 |
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| Coscinodiscus granulosus var. distincta Rattray 1890 |
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| Coscinodiscus grayianus Rattray 1890 |
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| Coscinodiscus griseus var. apiculata Rattray 1890 |
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| Coscinodiscus groveanus Rattray 1890 |
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| Coscinodiscus heteromorphus Rattray 1890 |
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| Coscinodiscus humilis Rattray 1890 |
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| Coscinodiscus implicatus Rattray 1890 |
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| Coscinodiscus implicatus var. picturata (picturatus) Rattray 1890 |
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| Coscinodiscus impolitus Rattray 1890 |
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| Coscinodiscus inaequisculptus Rattray 1890 |
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| Coscinodiscus inclusus Rattray 1890 |
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| Coscinodiscus inexpectatus Rattray 1890 |
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