FIGURE 16. A. IGM 100 in Osteology of a New Late Cretaceous Troodontid Specimen from Ukhaa Tolgod, Ömnögovi Aimag, Mongolia

FIGURE 16. A. IGM 100/1323, arrow indicates sampled eggshell fragment. Caliper edges are 5 mm apart. B. IGM 100/1323, eggshell under SEM. Line indicates boundary between mammillary (below line) and prismatic (above line) layers. C. IGM 100/1323, eggshell thin section under plane polarized light. Line indicates boundary between mammillary (below line) and prismatic (above line) layers. D. AMNH FARB 6631, clutch of 18 eggs, prepared with their bottom surfaces upwards. E. AMNH FARB 6631, eggshell under SEM. Line indicates boundary between mammillary (below line) and prismatic (above line) layers. F. AMNH FARB 6631, eggshell thin section under plane polarized light. Line indicates boundary between mammillary (below line) and prismatic (above line) layers.