Operculina complanata (Defrance in de Blainville, 1822)

Figure 12.10

1822 Lenticulites complanata Defrance, p. 453.

2004 Operculina complanata (Defrance); Hohenegger, p. 151, text-fig. 2.3.

2011 Operculina complanata (Defrance); Hohenegger, p. 659, fig. 2e.

2014 Operculina complanata (Defrance); Panchang and Nigam, pl. 39, fig. 3.

Description. Test thin, planispiral, surface ornamented with granular pustules in and around the umbilical region; chambers narrow, not separate, rapidly increasing in size; coiling evolute; septal flap flaring, slightly folded; periphery with a distinct keel, sutures distinct, marked with pustules initially, later faintly distinct.