| WebNameShort | |
| Coscinodiscus notabilis Rattray 1890 |
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| Coscinodiscus obnubilus Rattray 1890 |
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| Coscinodiscus obovatus var. circularis Rattray 1890 |
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| Coscinodiscus obscurus var. minor Rattray 1890 |
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| Coscinodiscus obversus Rattray 1890 |
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| Coscinodiscus obversus var. tenuior Rattray 1890 |
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| Coscinodiscus oculusiridis var. loculifera Rattray 1890 |
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| Coscinodiscus oculusiridis var. stelliger Rattray 1890 |
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| Coscinodiscus odontodiscus var. parvatenuistriata Rattray 1890 |
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| Coscinodiscus odontodiscus var. subsubtilis Rattray 1890 |
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| Coscinodiscus pectinatus Rattray 1890 |
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| Coscinodiscus perforatus var. delicatula Rattray 1890 |
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| Coscinodiscus perikompsos Rattray 1890 |
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| Coscinodiscus perikompsos var. curta Rattray 1890 |
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| Coscinodiscus perminutus Rattray 1890 |
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| Coscinodiscus planiusculus Rattray 1890 |
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| Coscinodiscus polurrhaptos Rattray 1890 |
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| Coscinodiscus pulcherrimus Rattray 1890 |
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| Coscinodiscus radiatus var. crenulatus (crenulata) Rattray 1890 |
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| Coscinodiscus robustus var. fragilis Rattray 1890 |
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