Taxonomy clear
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Helicosphaeroides crouchiiLanghian - Burdigalian
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Helicosphaeroides seminulumBartonian - Ypresian
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Helicosphaera euphratisBurdigalian - Priabonian
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Helicosphaeroides waltransLanghian - Burdigalian
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Helicosphaera carteri carteriRecent - Chibanian
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Helicosphaerella truncataLanghian - Latdorfian
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Helicosphaeroides ampliapertaLanghian - Burdigalian
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Helicosphaeroides scissurusLanghian - Aquitanian
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Helicosphaeroides amazonicaBurdigalian - Aquitanian
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Helicosphaerella wilcoxoniiRupelian - Priabonian
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Helicosphaerella obliquaSerravalian - Latdorfian
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Helicosphaeroides watkinsiiBurdigalian - Aquitanian
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Helicosphaeranudus walbersdorfensisMessinian - Serravalian
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Helicosphaeroides magnificaLanghian - Aquitanian
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Girgisia gammationLutetian - Ypresian
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Discolithina decorataChibanian - Aquitanian
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Discolithina japonicaRecent - Aquitanian
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Ceratolithus atlanticusZanclean - Tortonian
