Taxonomy clear
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Conusphaera rothii minorEarly Tithonian - Late Tithonian
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Conusphaera rothii rothiiEarly Tithonian - Early Aptian
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Conusphaera mexicana minorEarly Tithonian - Late Tithonian
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Conusphaera mexicana mexicanaEarly Tithonian - Early Aptian
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Conusphaera maledictoEarly Tithonian - Late Tithonian
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Cleistorhabdus williamsiiLate Aptian - Early Cenomanian
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Chiastozygus sp. 5Late Aptian
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Chiastozygus sp. 4Late Maastrichtian
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Chiastozygus sp. 3Late Maastrichtian
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Chiastozygus sp. 2Middle Campanian
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Chiastozygus sp.1Late Campanian
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Chiastozygus litterariusLate Barremian - Late Maastrichtian
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Chiastozygus fessusEarly Aptian - Late Maastrichtian
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Chiastozygus spissusLate Albian - Late Turonian
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Chiastozygus platyrhethusLate Aptian - Late Turonian
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Chiastozygus amphiponsLate Barremian - Late Maastrichtian
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Cervisiella cf.operculataLate Aptian
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Cervisiella operculataLate Campanian - Thanetian
