FIG. 9 in Cranial Morphology And Phylogenetic Relationships Of Trigonostylops Wortmani, An Eocene South American Native Ungulate

FIG. 9. Meniscotherium chamense AMNH VP-4412, Cochilius volvens AMNH VP-29651, and Tetramerorhinus lucarius AMNH VP-9245, reconstructions of brain endocast and endocranial vasculature in dorsal, right lateral, ventral, and caudal views (on this and facing page). For neural features, see text. Key: 1, posttemporal sulcus/canal (for vasa diploetica magna); 2, temporal sulcus/canal (for temporal sinus); 3, parietosquamosal canals (for parietosquamosal vessels); 4, hypoglossal canal (for condylar emissary vein); 5, sulcus for vertebral vein; 6, sulcus for ventral petrosal sinus (may include part of cavernous sinus); 7, sulcus for sigmoid sinus (may include proximal internal jugular vein); 8, retroarticular sulcus/ canal (for retroarticular emissary vein); 9, cranioorbital sulcus/canal (for cranioorbital sinus); a, sulcus for transverse sinus or sinus communicans; b, accessory lacunae of transverse sinus (few in number, not reconstructed in detail); c, sulcus for dorsal sagittal sinus; d, ethmoidal canal (for ethmoidal neurovascular bundle); e,?dorsal petrosal sinus; f, petromastoid canaliculus (for parafloccular vein); g, transclival