CYCLOLINA d'Orbigny, 1846
Type species: Cyclolina cretacea d'Orbigny, 1846; OD(M).
Cyclolina d'Orbigny. 1846 (*2309), p. 139.
Test free, discoidal, slightly undulating, up to 6 mm in diameter, increasing in thickness toward the periphery, early microspheric stage planispirally enrolled, megalospheric one lacking the early coil, later chambers cyclic,
concentric sutures slightly depressed; wall microgranular, calcareous, finely agglutinated, chamber lumen open, with no inner partitions or subdivisions; multiple aperture of rounded pores scattered in many rows over the apertural face, also observable in equatorial section. U. Cretaceous (Cenomanian); France.