Taxonomy clear
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Sullivania californicaYpresian - Selandian
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Helicosphaera dyoporousRecent - Serravalian
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Helicosphaera kilidaChibanian
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Helicosphaera pterigaChibanian
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Helicosphaera carteri treisporoiRecent - Tortonian
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Helicosphaera carteri rotundusRecent - Burdigalian
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Helicosphaera carteri kamptneriRecent - Burdigalian
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Helicosphaera carteri epimikeisporousRecent - Serravalian
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Pontosphaera lepidaTarantian - Zanclean
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Discolithina jonesiiTarantian - Zanclean
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Pontosphaera alabamaensisDanian
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Umbellosphaera tenuisRecent - Zanclean
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Tintinnabuliformis bicornusZanclean - Serravalian
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Tintinnabuliformis unicornCalabrian - Serravalian
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Scampanella wiseiThanetian - Danian
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Rigaudia multiradiataRecent - Zanclean
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Micrascidites vulgarisRecent - Thanetian
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Bonetia brevisRecent - Langhian
