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| Coscinodiscus superbus Hardman manuscript in Rattray 1890 |
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| Coscinodiscus suberbus Hardman manuscript, Rattray 1890 |
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| Coscinodiscus imperator Janisch manuscript in Rattray 1890 |
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| Coscinodiscus gigas var. californica O'Meara ex Rattray 1890 |
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| Coscinodiscus subtilis O'Meara in litt. in Rattray 1890 |
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| Coscinodiscus californicus O'Meara manuscript in Rattray 1890 |
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| Actinogonium multiradiatum Rattray 1890 |
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| Asterolampra decora var. concentrica Rattray 1890 |
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| Asterolampra marylandica var. ramosa Rattray 1890 |
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| Asterolampra princeps Rattray 1890 |
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| Asterolampra tenerrima Rattray 1890 |
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| Asterolampra traducens Rattray 1890 |
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| Asterolampra vulgaris var. cellulosa Rattray 1890 |
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| Asterolampra vulgaris var. planior Rattray 1890 |
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| Asteromphalus imbricatus var. rectiradiata Rattray 1890 |
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| Asteromphalus rarus Rattray 1890 |
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| Brightwellia coronata var. radians Rattray 1890 |
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| Brightwellia excellens Rattray 1890 |
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| Coscinodiscus aethes Rattray 1890 |
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| Coscinodiscus agapetos Rattray 1890 |
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