VISEINA Conil and Lys, 1977
Type species: Septatournayella? conspecta
Conil and Lys, 1967 (*664),
p. B400; OD.
Viseina Conil and Lys. 1977 (*667), p. 20.
Test large, up to 1.15 mm in diameter, enrolled throughout, early whorls undivided, later with pseudochambers, and final whorl with true septa and somewhat inflated chambers; wall calcareous, thin in the early whorls, becoming much thicker in the final whorl, of two layers, the outer one with occasional agglutinated calcite grains; aperture basal and simple in the early stage, then areal and finally cribrate in the adult. L. Carboniferous (Visean); Belgium; USSR.