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Morphological Attributes: Wallmaterial: hyaline Overall appearance: elongate Coiling: biserial Chamberform: triangular to trapezoid Aperture Position: basal Aperture Form: round oval reniform, --, no neck, no lip Sutures: depressed, curved, -- Ornamentation: --, --, --, -- |
type specimen holotype Cretaceous Upper Cretaceous Mexico and Middle America unknown FEU-1008600 |  | type specimen holotype Cretaceous Upper Cretaceous unknown FEU-1022427 |  |