Sumatrininae Silvestri 1933

Subfamily SUMATRININAE Silvestri, 1933 Test of medium to large size, ellipsoid to fusiform or subcylindrical; pendant secondary spiral and axial septula of uniform length, with up to four secondary septula between two primary ones; wall thin, compact, with poorly differentiated structure; thin long parachomata present, axial fillings in all but last part of final whorl (Loeblich & Tappan 1987). Composition: Sumatrina Volz, 1904; Afghanella Thompson, 1946; Neosumatrina Chediya in Kotlyar et al., 1989; Presumatrina Tumanskaya, 1950.