Rotalidium annectens (Parker and Jones, 1865)

Figure 4.17-18

1865 Rotalia beccarii (Linnaeus) var. annectens Parker and Jones, pp. 387, 422, pl.19, fig. 11a-c.

2008 Rotalidium annectens (Parker and Jones); Panchang, p. 246, pl. 37, figs. 4a-c, 5a-c.

Description. Test large, round, wall calcareous, perforate, surface smooth, umbilicus with irregular calcitic knobs; chambers compressed on the dorsal side, ventral side convex, trochospirally arranged, peripheral margin acute, periphery with an imperforate keel, dorsal sutures nearly straight and limbate, radial and very much depressed on the ventral side; aperture interiomarginal, subcircular slit-like opening.