Taxonomy clear
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Lithostromation operosumTortonian - Lutetian
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Lithostromation biconvexitasMiddle Miocene
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Lithostromation perdurumCalabrian - Lutetian
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Ilselithina fusaAquitanian - Chattian
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Helicosphaeroides girgisiiTortonian - Serravalian
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Helicosphaera wallichiiRecent - Tortonian
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Helicosphaera selliiCalabrian - Messinian
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Helicosphaerella rectaBurdigalian - Latdorfian
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Helicosphaerella orientalisTortonian - Serravalian
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Helicosphaerella philippinensisTortonian - Langhian
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Helicosphaera omanicaTarantian - Chibanian
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Helicosphaera neogranulataCalabrian
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Helicosphaeroides mulleraeSerravalian - Langhian
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Helicosphaera inversaChibanian
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Helicosphaera bowniiSerravalian - Langhian
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Emiliania huxleyiRecent - Chibanian
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Cribrocentrum antillarumBurdigalian - Bartonian
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Cribrocentrum gartneriBurdigalian - Lutetian
