FIGURE 1. Lower p3 enamel ultrastructure; Prolagus aff. crusafoni from Popovo 3, cross-section.
FIGURE 2. Posterior lobe of lower m2 enamel ultrastructure; Prolagus aff. crusafoni from Popovo 3, cross- section. 1-4, Enamel structure details from four different tooth parts.
FIGURE 3. Lower p3 enamel ultrastructure; Ochotona sp. from Popovo 3, cross-section.
FIGURE 4. Lower m2 enamel ultrastructure; Ochotona sp. from Popovo 3, cross-section.
FIGURE 5. Upper incisor enamel ultrastructure; Ochotona sp. from Popovo 3, cross-section.
FIGURE 6. Lower incisor enamel ultrastructure; Ochotona sp. from Popovo 3, longitudinal section. 1-2, Enamel structure details from two different tooth parts.
FIGURE 7. Lower p3 enamel ultrastructure; Ochotona cf. eximia from Verkhnya Krynytsya 2, cross-section.
FIGURE 8. Posterior lobe of lower m2 enamel ultrastructure; Ochotona cf. eximia from Verkhnya Krynytsya 2, cross-section.
FIGURE 9. Lower incisor enamel ultrastructure of Ochotona cf. eximia from Verkhnya Krynytsya 2, cross-section.
FIGURE 10. Lower p3 enamel ultrastructure; Ochotona sp. from Lobkove, cross- section.
