Figure 7.18. and 20. Praeobsoletes burkemensis (Volozhanina 1962), scale bar = 33mm, both axial sections, bed 81.0 m, 18, (PMO-43861/3a); 20. (PMO-43861/12a); 20a, enlargement of figure 8-20, scale bar = 110mm, Praeobsoletes wall structure with Fusulinella type wall in inner volutions (dark tectum, light diaphanotheca, inner and outer tectoriums) and with tectum and very thin gray primatheca with poor developed pores in outer volution. Fusulinid assemblage of Protriticites pseudomontiparus, Obsoletes obsoletus Zone.