Fig. 3
From: Cranial and mandibular anatomy of Plastomenus thomasii and a new time-tree of trionychid evolution
Three dimensional renderings of the cranium of Plastomenus thomasii (AMNH FR 6015). A dorsal view; B ventral view; C left lateral view; D right lateral view. Note that bones are labelled in bold. boc basioccipital, bt basi tuber, ct cavum tympani, epi epipterygoid, ex exoccipital, f frontals (fused), fpcci foramen posterius canalis carotici interni, fpp foramen palatinum posterius, fsm foramen supramaxillare, fst foramen stapedio-temporale, iqr infolding quadrate ridge, j jugal, labr labial ridge, mx maxilla, op opisthotic, pal palatine, par parietal, pbs parabasisphenoid, ppe processus pterygoideus externus, prf prefrontal, pro prootic, pt pterygoid, q quadrate, qj quadratojugal, soc supraoccipital, sq squamosal, v vomer