Fig. 7
From: Cranial and mandibular anatomy of Plastomenus thomasii and a new time-tree of trionychid evolution
Three dimensional renderings of the exterior trigeminal region of the cranium of Plastomenus thomasii (AMNH FR 6015). Partial cranium in left anterolateral and slight ventral view, with jugal and quadratojugal removed. Note that bones are labelled in bold. ap antrum postoticum, crcr crista cranii, epi epipterygoid, epp epipterygoid process of quadrate, eun Eustachian notch, f frontals (fused), ica incisura columellae auris, mx maxilla, pal palatine, par-orf orbital fossa of the parietal, par parietal, prf prefrontal, pt pterygoid, pto processus trochlearius oticum, q quadrate, sq squamosal, tf trigeminal foramen