Taxonomy clear
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Coccolithus streckeriTarantian - Aquitanian
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Hughesius synchysiSerravalian
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Clausicoccus fenestratusBurdigalian - Ypresian
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Clausicoccus singularisAquitanian - Ypresian
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Chiphragmalithus cristatusLutetian
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Chiasmolithus eograndisYpresian
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Helicosphaeroides africanusChattian
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Helicosphaeroides minimusChattian - Latdorfian
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Helicosphaera acutaCalabrian - Gelasian
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Helicosphaera truempyiChattian
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Helicosphaera amplaChattian
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Helicosphaerella perch-nielseniaeLanghian - Latdorfian
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Helicosphaerella elongataSerravalian - Latdorfian
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Helicosphaera tenebriscornusRecent - Langhian
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Helicosphaeroides californianaSerravalian - Burdigalian
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Helicosphaera paleocarteriTortonian - Burdigalian
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Helicosphaera incisuraZanclean - Serravalian
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Helicosphaerella grandeporisAquitanian - Chattian
