FIG. 31. —A in Dental ontogeny in the early Paleocene placental mammal Alcidedorbignya inopinata (Pantodonta) from Tiupampa (Bolivia)

FIG. 31. —A, transparent lateral view of the left mandible MHNC 8286 of juvenile Alcidedorbignya inopinata (stage 4) showing the trigonid of p4 and protoconid and probable metaconid of m3 in process of mineralisation in their respective crypts; B, enlarged view of the trigonid of p4 in the same position as in its crypt; C, enlarged view of the protoconid and metaconid of m3 in the same position as in its crypt (the cusps of the trigonid of m3 are not in their natural position since they have been displaced and rotated before filling of the crypt with sediment); D, occlusal view of the trigonid of p4; E, occlusal view of the protoconid and metaconid of m3, which have been restored in their original positions. Scale bars: A, 5 mm; B-E, 1 mm.