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Figure 6.10. Fusulinella helenae Safonova 1951, scale bar = 33mm, near axial section, bed 79.0 m, (PMO-43858/14a); 10a, enlargement of figure 7-10, scale bar = 110mm, wall structure with tectum, diaphanotheca and dark inner and outer tectorium. Fusulinid assemblage of Protriticites ex gr. ovatus-Quasifusulinoides quasifusulinoides Zone