Heterocyclina Hottinger 1977

Heterocyclina es un género de foraminífero bentónico de la familia Nummulitidae, de la superfamilia Nummulitoidea, del suborden Rotaliina​ y del orden Rotaliida.​ Su especie tipo es Heterostegina tuberculata. Su rango cronoestratigráfico abarca el Holoceno.

Test discoidal, thin, megalospheric proloculus followed by three to four planispiral and evolute whorls of progressively more elongate chambers, finally becoming annular in the adult, postembryonic chambers subdivided by complete secondary septa, earliest one or two chambers operculine and then up to twenty-eight heterostegine ones, the latest spiral chamber containing about fifty septula and chamberlets, sutures not ornamented and early ones may be obscured at the surface by secondary lamellation, stolon system L-shaped, one radial and one annular stolon per chamberlet occupy a single layer in the median plane where the secondary septum touches the frontal wall of the chamber, adjacent chambers have no other interconnection, sutural canals of primary and secondary septa simple and unbranched; wall calcareous, very finely perforate, large interseptal pillars present on the lateral wall of the chamberlets; apertural face of annular chambers deeply folded, the grooves taking the place of the marginal cord of those with spiral chambers at the periphery. Holocene; Mauritius; Gulf of Aqaba; off Madagascar. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification)