Fig. 3 in Petrosal and cranial vascular system of the early Eocene palaeoryctid mammal Eoryctes melanus from northwestern Wyoming, USA

Fig. 3. Palaeoryctid mammal Eoryctes melanus Thewissen and Gingerich, 1989, UM 68074 (UM locality SC-133, Clarks Fork Basin, Wyoming, USA; early Wasatchian Land-Mammal Age, early Eocene), isosurfaces rendered from CT scans in medial view. A. Left endocranium (petrosal in gold; parietal in yellow; basi- and alisphenoid in red; pre- and orbitosphenoid in blue; frontal in green). B. Left petrosal. C. Left petrosal with neurovascular structures reconstructed (redrawn from Avizo segmentation; arteries in red; nerves in yellow). Abbreviations: as, alisphenoid; bo, basioccipital; bs, basisphenoid; cc, cochlear canaliculus; cn VII, cranial nerve VII; crp, crista petrosa; eo, exoccipital; ew, epitympanic wing; fr, frontal; frt, foramen for ramus temporalis; gpn, greater petrosal nerve; gri, groove for ramus inferior; grs, groove for ramus superior; hF, hiatus Fallopii; hyf, hypophyseal fossa; iam, internal acoustic meatus; ica, internal carotid artery; M3, upper third molar; mcf, middle cranial fossa; os, orbitosphenoid; otc, orbitotemporal canal; otg, orbitotemporal groove; pa, parietal; pal, palatine; pc, promontory canal; pca, pars canalicularis; pco, pars cochlearis; pe, petrosal; ps, presphenoid; ri, ramus inferior; rs, ramus superior; rtp, rostral tympanic process; saf, subarcuate fossa; sips, sulcus for inferior petrosal sinus; so, supraoccipital; sof(br), sphenorbital fissure (broken); sq, squamosal; sss, sulcus for sigmoid sinus; tt, tegmen tympani; va, vestibular aqueduct.