Planogypsina acervalis (Brady, 1884)

Figure 12.20

1884 Planorbulina acervalis Brady, p. 657, pl. 92, fig. 4.

2009 Planogypsina acervalis (Brady); Debenay, p. 246.

Description. Test attached, large, outline nearly discoid, dorsal side slightly convex, ventral side flattened, wall coarsely perforate; chambers inflated, subglobular, evenly added, and almost equidimensional, secondary chambers added irregularly and dispersed on the entire test surface; peripheral margin cuspate, periphery lobulated; primary apertures two arched openings at the juncture of earlier chambers, bordered by a rim, secondary apertures multiple, tiny sutural openings at either side of the test, peripheral and tubular openings.