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Swiss Journal of Palaeontology
Fig. 10 | Swiss Journal of Palaeontology

Fig. 10

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. 10

3D renderings of the parabasisphenoid, left pterygoid and left epipterygoid of FMNH UC 1501, Stylemys nebrascensis. A Left anterodorsolateral view. B Same as A, but with superimposed interpretative line drawing. Note that bones are labelled in bold font, and traits in regular font. Also note that many of the indicated foramina are only fully formed when the dorsally adjacent bones (prootic, opisthotic) are articulated. cci, canals carotici interni; clp, clinoid process; cpt, crista pterygoidei; ds, dorsum sellae; dscf, dorsal subcavernosal foramen; ep, epipterygoid; faccc, foramen anterius canalis carotici cerebralis; fcav, foramen cavernosum; ficcc, foramen internum canalis carotici cerebralis; fnt, foramen nervi trigemini; fpcci, foramen posterius canalis carotici interni; lfl, lateral flange; pbs, parabasisphenoid; plhv, passage for the lateral head vein; ppe, processus pterygoideus externus; psta, passage for the stapedial artery; pstf, poststapedial foramen; pstp, poststapedial process; pt, pterygoid; rb, rostrum basisphenoidale; scav, sulcus cavernosus; st, sella turcica; tra, trabecula; VI, abducens nerve foramen for the CN VI

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