As with modern foraminifera, strategies of reproduction involved alternating sexual (gamont) and asexual (agamont) generations, resulting in a population consisting of two distinct size groups (dimorphism).
Asexual reproduction resulted in forms having a small initial chamber (proloculus), while sexual reproduction resulted in a large (megalospheric) proloculus.
The sexually produced A-form generation produced fewer chambers and is smaller than the asexual, B-form, generation.
Free-swimming gametes leave the shell of asexually produced adults.