none
Geological Time: Neogene Miocene
holotype
View of a specimen of Cibicides concavus Dorn Ms., 1941
The identification is based upon:
, : LeRoy, L. W. (1941). Smaller Foraminifera from the Late Tertiary of the Nederlands East Indies. Part I, Small foraminifera from the Late Tertiary of the Sangkoelirang Bay area, East Borneo, Nederlands East Indies. Part II, Small foraminifera from the Late Tertiary of Siberoet Island, off the west coast of Sumatra, Nederlands East Indies. Part III, Some small foraminifera from the type locality of Plate , Fig.