Taxonomy clear
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Caracomia arcticaRecent - Chattian
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Calcidiscus sp._BYpresian
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Calcidiscus sp._AYpresian
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Calcidiscus tanianusChibanian - Burdigalian
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Calcidiscus salomoniiChibanian - Serravalian
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Calcidiscus premacintyreiSerravalian - Burdigalian
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Calcidiscus pataecusChibanian - Priabonian
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Calcidiscus parvicrucisYpresian - Thanetian
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Calcidiscus tropicusTortonian - Serravalian
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Calcidiscus gallagheriAquitanian - Chattian
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Calcidiscus bicircusBartonian - Ypresian
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Cruxia ataniiLutetian - Ypresian
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Amaurolithus tricorniculatusZanclean - Tortonian
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Reticulofenestra gelidaTortonian - Serravalian
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Velonalithus rioiSerravalian - Langhian
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Arkhangelskiella specillataLate Maastrichtian - Late Santonian
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Arkhangelskiella paucipunctataLate Maastrichtian - Early Campanian
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Arkhangelskiella umbracrucisLate Maastrichtian - Early Coniacian
