Globigerinoides trilobus (Reuss, 1850)

Figure 14.5-6

1850 Globigerina triloba Reuss, p. 374, pl. 47, fig. 11a-c.

1983 Globigerinoides triloba (Reuss); Kennet and Srinivasan, p. 62, pl. 10, fig. 4; pl. 13, figs. 1- 3.

2010 Globigerinoides trilobus (Reuss); Ovechkina, Bylinskaya and Uken, p. 246, fig. 8E, 8F.

Description. Test trilobate, wall coarsely perforate, surface ornamented with spines; chambers globular, increasing in size as added, chamber arrangement trochospiral; periphery rounded, sutures very distinct and depressed; primary aperture umbilical, slit-like or low, slightly wide symmetrical arch, secondary apertures subrounded.