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Class:
Globothalamea
Subclass:
Textulariana
Order:
Loftusiida
Family:
Ataxophragmiidae
Opertum
Voloshina, 1972
Opertum incognitum
(Voloshinova, 1972)
identified by scientist
Cretaceous
Eastern European Plain
Opertum incognitum
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