Morphological Attributes: Wallmaterial: hyaline Overall appearance: elongate Coiling: spiral to serial Chamberform: triangular to trapezoid Aperture Position: terminal Aperture Form: --, no tooth, no neck, no lip Sutures: --, curved, -- Ornamentation: --, --, --, keeled |
type specimen holotype Cretaceous Upper Cretaceous Mexico and Middle America unknown FEU-1007686 | type specimen holotype Cretaceous Upper Cretaceous unknown FEU-1022132 |