Planostegina operculinoides (Hofker, 1927)

Figure 12.16

1927 Heterostegina operculinoides Hofker, p. 67, pl. 34, figs. 2, 4, 5.

2004 Planostegina operculinoides (Hofker); Hohenegger, p. 151, text-fig. 2.5.

2011 Planostegina operculinoides (Hofker); Hohenegger, p. 659, fig. 2h.

2012 Heterostegina operculinoides (Hofker); Debenay, p. 222.

Description. Test very much flattened, thin, planispiral, wall calcareous, surface ornamented with granular pustules in the central portion; chambers arch-shaped, subdivided into chamberlets, rapidly increasing in size; sutures of chambers often marked with pustules, of chamberlets, distinct and depressed; aperture terminal, at the end of the apertural face.