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Morphological Attributes: Wallmaterial: Overall appearance: Coiling: Chamberform: Aperture Position: Aperture Form: , , , Sutures: , , Ornamentation: , , , |
type specimen holotype Cretaceous Upper Cretaceous Mexico and Middle America unknown FEU-1007683 |  | identified by scientist Jurassic Upper Jurassic Tithonian off West Australia ODP Leg 123 Site 765 FEU-1008944 |  |