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Swiss Journal of Palaeontology
Fig. 7 | Swiss Journal of Palaeontology

Fig. 7

From: Digital skull anatomy of the Oligocene North American tortoise Stylemys nebrascensis with taxonomic comments on the species and comparisons with extant testudinids of the Gopherus–Manouria clade

Fig. 7

3D renderings of the cranium of Gopherus polyphemus (FMNH 211815), with the left cranial side segmented bone by bone. A Dorsal view. B Ventral view. C Close-up of premaxillary-vomerine area. D Left lateral view. E Posterior view. Note that bones are labelled in bold font, and traits in regular font. acc, accessory ridge; ap, antrum postoticum; boc, basioccipital; cag, carotid artery groove; crcr, crista cranii; cvc, central vomerine cleft; ds, deeply embayed sulcus of articular process, ep, epipterygoid; ex, exoccipital; f, frontal; fjp, foramen jugulare posterius; fon, foramen orbito-nasale; fpp, foramen palatinum posterius; fprp, foramen praepalatinum; fst, foramen stapedio-temporale; ica, incisura columellae auris; j, jugal; labr, labial ridge; linr, lingual ridge; maf, mandibular artery foramen; mpr, median premaxillary ridge; mx, maxilla; op, opisthotic; par, parietal; pal, palatine; pbs, parabasisphenoid; pif, processus interfenestralis; pm, premaxilla; pmp, posterior maxillary process; po, postorbital; prf, prefrontal; pro, prootic; pt, pterygoid; pte, processus pterygoideus externus; q, quadrate; qj, quadratojugal; soc, supraoccipital; sq, squamosal; tf, trigeminal foramen; v, vomer

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