Spirosigmoilina tenuis (Cžjžek, 1848)

Figure 21.3-4

1848 Quinqueloculina tenuis Cžjžek, p. 149, pl. 13, figs. 31-34.

2014 Sigmoilinita tenuis (Cžjžek); Panchang and Nigam, pl. 14, fig. 3a-c.

Description. Test elongate, compressed, wall calcareous, translucent, surface smooth; chambers sigmoidal initially, later arranged in quinqueloculine plan, periphery broadly rounded, sutures very distinct and depressed; aperture terminal, small, circular at the end of a short neck.