Amphistegina bicirculata Larsen, 1976

Figure 7.1-2

1976 Amphistegina bicirculata Larsen, p. 10, pl. 2, figs. 1-5; p. 16, text-figs. 9.2, 10.2.

2002 Amphistegina bicirculata Larsen; Yordanova and Hohenegger, p. 178, pl. 31, figs. 9-12.

2007 Amphistegina bicirculata Larsen; Yordanova and Hohenegger, p. 1276, fig. 1.11.

2012 Amphistegina bicirculata Larsen; Debenay, p. 215.

2014 Amphistegina bicirculata Larsen; Hohenegger, p. 723, fig. 17.

2014 Amphistegina bicirculata Larsen; Panchang and Nigam, pl. 32, figs. 9a-b, 10a-b.

Description. Test flat, lenticular, unequally biconvex or slightly spiroconvex, wall calcareous, surface smooth; chambers initially radiate, later nicely curved at the periphery, chamber arrangement low trochospiral, coiling involute; peripheral margin acute, slightly keeled, sutures slightly depressed; aperture interiomarginal, a slit-like opening, surrounded by pustules, bordered by a lip.