Order “Rotaliida” > Family “Nummulitidae” > Genus “Heterostegina”

Original description	Orbigny, A. D’, 1826, Annales du Museum d’Histoire Naturelles, Paris, 7, 1-275
Description	Hohenegger, J., Yordanova, E., Hatta, A., 2000, J. Foram. Res., 30, 3-28
Further reference	Holzmann M., Hohenegger J., Pawlowski J., 2003, J. For. Res., 33, 277-284 (127 KB)
Further reference	Holzmann, M., Berney, C., Hohenegger, J., 2006, Symbiosis, 42, 93-101 (3.03 MB)
Description	Hottinger, L., 1977, Mémoires du Muséum National d`Histoire Naturelle, Paris., 40, Série C, 1-159

General description

Central part of the test is thickened, early chambers are undivided, later ones are divided by secondary septa. Diatom symbionts lead to a brownish colour in living specimens.