Category:Gastrioceras

DomainEukaryota • RegnumAnimalia • SubregnumEumetazoa • CladusBilateria • SuperphylumProtostomia • PhylumMollusca • ClassisCephalopoda • SubclassisAmmonoidea • OrdoGoniatitida • SubordoGoniatitina • SuperfamiliaGastrioceratoidea • FamiliaGastrioceratidae • Genus: Gastrioceras
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