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.