FIG. 49 in Alcidedorbignya inopinata, a basal pantodont (Placentalia, Mammalia) from the early Palaeocene of Bolivia: anatomy, phylogeny and palaeobiology

FIG. 49. — Anteromedial view of the endocranial aspect of the left auditory region of Alcidedorbignya inopinata (MHNC 8372) showing the vestigial anterior lamina of the petrosal, which bears the fossa for the trigeminal ganglion (photograph, schematic drawing on photo, and schematic drawing with captions). Abbreviations: dos, dorsum sellae; fo, foramen ovale; hyf, hypophyseal fossa; iosr, intracranial opening of the foramen for the superior ramus of the stapedial artery; pofrc, posterior opening of the foramen rotundum canal; psf, petrosquamosal fossa; pyf, pyriform fenestra; saf, subarcuate fossa; sV2, probable sulcus for the maxillary nerve (CN V2); valp, vestigial anterior lamina of the petrosal. Scale bar: 5 mm.Published as part of Muizon, Christian de, Billet, Guillaume, Argot, Christine, Ladevèze, Sandrine & Goussard, Florent, 2015, Alcidedorbignya inopinata, a basal pantodont (Placentalia, Mammalia) from the early Palaeocene of Bolivia: anatomy, phylogeny and palaeobiology, pp. 397-634 in Geodiversitas 37 (4) on page 471, DOI: 10.5252/g2015n4a1, http://zenodo.org/record/521063