CALCIVERTELLA Cushman and Waters, 1928
Type species: Calcivertella adherens
Cushman and Waters, 1928; OD.
Cushman and Waters. 1928 (*857), p. 48.
encircled by gradually enlarging tubular undivided second chamber that later uncoils, growing in numerous closely appressed zigzag bends and finally rectilinear; wall calcareous, imperforate, porcelaneous; aperture at the open end of the tube. U. Carboniferous Stephanian), Virgilian; USA: Texas.