CYCLAMMINA Brady, 1879

 

 

Type species: Cyclammina cancellata Brady, 1879; OD.

Cyclammina Brady, 1879 (*337), p. 62.

Cyclammina Brady, in Norman, in Jeffreys, 1876 ( *1603), p. 214 (nom. nud.).

Test planispirally coiled and involute, some-what flattened, numerous broad and low cham­bers per whorl, whorls increasing rapidly in height, sutures nearly radial, periphery broadly rounded; wall agglutinated, with very thin imperforate outer layer and prominent thick alveolar subepidermal meshwork of a thick­ness exceeding that of the chamber lumen; aperture an interiomarginal equatorial slit and a series of round pores with elevated rims scattered over the face. Paleocene to Holo­cene; cosmopolitan.