Taxonomy clear
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Helicosphaerella bipunctaLatdorfian - Langhian
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Helicosphaera intermediaBartonian - Zanclean
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Helicosphaerella lenticulataChattian - Burdigalian
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Helicosphaera granulataBurdigalian - Serravalian
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Helicosphaerella antistrofaobliquaLatdorfian - Serravalian
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Helicosphaeroides vedderiBurdigalian - Langhian
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Helicosphaeroides crouchiiBurdigalian - Langhian
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Helicosphaeroides seminulumYpresian - Bartonian
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Helicosphaeroides lophotesYpresian - Priabonian
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Helicosphaera euphratisPriabonian - Burdigalian
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Helicosphaeroides waltransBurdigalian - Langhian
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Helicosphaera carteriChibanian - Meghalayan
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Helicosphaerella truncataLatdorfian - Langhian
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Helicosphaeroides ampliapertaBurdigalian - Langhian
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Helicosphaeroides scissurusAquitanian - Langhian
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Helicosphaeroides amazonicaAquitanian - Burdigalian
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Helicosphaerella wilcoxoniiPriabonian - Rupelian
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Helicosphaeroides dineseniiLutetian
