Heterostegina depressa d’Orbigny, 1826

Figure 12.15

1826 Heterostegina depressa d’Orbigny, p. 305, pl. 17, figs. 5-7.

2001 Heterostegina depressa d’Orbigny; Szarek, p. 151, pl. 28, fig. 5 (not fig. 6).

2008 Heterostegina depressa d’Orbigny; Meriç, Avşar, and Yokeş, p. 323, pl. 10, figs. 1-12.

2011 Heterostegina depressa d’Orbigny; Hohenegger, p. 659, fig. 2k.

Description. Test complanate, central portion thickened, wall calcareous, surface slightly rough; chambers many, elongate and curved, initial chambers undivided, thick and involute, final chambers subdivided by septa, thin and flaring; periphery thin and rounded, sutures distinct, very slightly depressed and limbate; aperture terminal, multiple openings on the apertural face.