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| Actinoptychus undulatus f. octoplicata Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Biddulphia rigida var. scandica Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Coscinodiscus antiquus var. paucispinosa (Cleve-Euler) Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Coscinodiscus odontophorus (Grunow) Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Craspedodiscus minor Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Craspedodiscus oblongus var. minor Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Endictya zabelinae Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Hemiaulus februatus f. major Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Hemiaulus februatus var. maximus Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Hemiaulus februatus f. minor Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Hemiaulus maximus Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Hemiaulus maximus f. major Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Hemiaulus maximus f. minor Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Hesslandia scanica Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Isthmia nervosa f. micropora Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Lepidodiscus hesslandii Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Melosira clavigera var. minor Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Melosira ornata var. minor Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Paralia sulcata f. minor Cleve-Euler in Cleve-Euler & Hessland 1947 |
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| Sceptroneis gemmata var. jutlandica Cleve-Euler in Cleve-Euler & Hessland 1947 |
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