Fig. 8
From: Cranial and mandibular anatomy of Plastomenus thomasii and a new time-tree of trionychid evolution
Three dimensional renderings of the posterior of the cranium of Plastomenus thomasii (AMNH FR 6015). A posterior view; B left posterolateral and slight ventral view. Note that bones are labelled in bold. boc basioccipital, bt basi tuber, csoc crista supraoccipitalis, eun Eustachian notch, ex exoccipital, fjp foramen jugulare posterius, fpcci foramen posterius canalis carotici interni, iqr infolding quadrate ridge, occ occipital condyle, op opisthotic, par parietal, pop paroccipital process, pt pterygoid, q quadrate, soc ssupraoccipital, sq squamosal