Figure 8. Ultra high resolution X in Cranial anatomy of Paleocene and Eocene Labidolemur kayi (Mammalia: Apatotheria), and the relationships of the Apatemyidae to other mammals

Figure 8. Ultra high resolution X-ray computed tomography (uhrCT) slices of USNM 530208. Slices portrayed were taken in the coronal plane at the levels indicated with horizontal lines on the ventral view of USNM 530208. In the slices ventral is towards the top of the image. The uhrCT data set comprises 361 slices collected moving rostrally (i.e. slice no. 1 is at the caudal extent of the cranium). (A) slice no. 319; the white arrow indicates the opening to the alisphenoid canal. (B) slice no. 279; the white arrow indicates the foramen ovale. (C) slice no. 188; the white arrow indicates the foramen for the ramus superior of the stapedial artery. (D) slice no. 170; the white arrow indicates the facial canal at its opening into the tympanic cavity (= facial foramen). (E) slice no. 145; the white arrow indicates the separation between the medial petrosal and the basisphenoid tympanic process; the dashed arrow points to the gap between the petrosal and squamosal elements on the side of the neurocranium. Note also the extensive pneumatization of the petrosal.