Taxonomy clear
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Helicosphaera selliiMessinian - Calabrian
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Helicosphaerella rectaLatdorfian - Burdigalian
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Helicosphaerella orientalisSerravalian - Tortonian
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Helicosphaerella philippinensisLanghian - Tortonian
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Helicosphaera neogranulataCalabrian
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Helicosphaeroides mulleraeLanghian - Serravalian
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Helicosphaera inversaChibanian
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Helicosphaera bowniiLanghian - Serravalian
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Emiliania huxleyiChibanian - Meghalayan
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Cribrocentrum albitectusBartonian - Burdigalian
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Cribrocentrum gartneriLutetian - Burdigalian
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Helicosphaera mediterraneaBurdigalian
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Coccolithus cf.miopelagicusChattian - Tortonian
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Crystallolithus hyalinusExtant
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Cyclicargolithus neogammationLutetian - Serravalian
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Cyclicargolithus abisectusRupelian - Aquitanian
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Cyclicargolithus luminisYpresian - Chattian
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Cyclicargolithus floridanusLutetian - Serravalian
