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Swiss Journal of Palaeontology
Fig. 9 | Swiss Journal of Palaeontology

Fig. 9

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. 9

3D renderings of the trigeminal area of Stylemys nebrascensis. A Left partial cranium of FMNH UC 1501 in anterolateral view. B Close-up of processus trochlearis oticum. C Right partial cranium of UMMP 9318 in anterolateral view. D close-up of processus trochlearis oticum. Note that bones are labelled in bold font, and traits in regular font. apo, antrum postoticum; cs, concave surface of processus trochlearis oticum; ct, cavum tympani; ep, epipterygoid; facnv, foramen anterius canalis nervi vidiani; fpp, foramen palatinum posterius; opf, ophthalmic foramen; pal, palatine; par, parietal; pip, processus inferior parietalis; pro, prootic; pt, pterygoid; pte-f, flange of processus pterygoideus externus; pto, processus trochlearis oticum; ptor, processus trochlearis oticum ridge; q, quadrate; qap, quadrate articular process; soc, supraoccipital; str, subtrigeminal ridge; sq, squamosal; tf, trigeminal foramen

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