Taxonomy clear
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Percivalia hauxtonensisEarly Albian - Late Cenomanian
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Percivalia fenestrataEarly Berriasian - Early Turonian
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Percivalia arataEarly Tithonian - Early Berriasian
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Salomonia tuzuniorumEarly Campanian
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Salomonia elkefensisEarly Maastrichtian - Late Maastrichtian
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Salomonia biperforatusEarly Coniacian - Early Campanian
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Hattneria scutulaLate Valanginian - Early Campanian
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Hattneria levisLate Campanian - Early Maastrichtian
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Hattneria glabraEarly Campanian - Late Campanian
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Hattneria elegansEarly Turonian - Late Campanian
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Hattneria cryptochondrusEarly Turonian - Late Campanian
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Amphizygus minimusMiddle Santonian - Early Maastrichtian
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Amphizygus nanusEarly Coniacian - Late Campanian
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Amphizygus brooksiiEarly Coniacian - Early Maastrichtian
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Amphizygus megalopsAlbian - Santonian
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Lapideacassis tricornusMiddle Albian - Early Maastrichtian
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Lapideacassis variusAptian - Priabonian
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Lapideacassis mariaeEarly Aptian - Early Maastrichtian
